0001001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 1001002 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 1002003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1003004 - Statement - CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 1004005 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 1005006 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 1006007 - Statement - CONSOLIDATED STATEMENTS OF EQUITY link:presentationLink link:calculationLink link:definitionLink 2101101 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2202201 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 2303301 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 2404401 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2405402 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Schedule of Other Property and Investments (Details) link:presentationLink link:calculationLink link:definitionLink 2406403 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Summary of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2407404 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Schedule of Estimated Future Amortization of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2408405 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Schedule of Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 2409406 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Schedule of Capitalized and Debt Portion of AFUDC (Details) link:presentationLink link:calculationLink link:definitionLink 2410407 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Other Income (Deductions) (Details) link:presentationLink link:calculationLink link:definitionLink 2411408 - Disclosure - Background, Organization, and Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic and Diluted (Details) link:presentationLink link:calculationLink link:definitionLink 2112102 - Disclosure - Utility Plant and Leases link:presentationLink link:calculationLink link:definitionLink 2313302 - Disclosure - Utility Plant and Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 2414409 - Disclosure - Utility Plant and Leases - Schedule of Net Utility Plant (Details) link:presentationLink link:calculationLink link:definitionLink 2415410 - Disclosure - Utility Plant and Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2416411 - Disclosure - Utility Plant and Leases - Schedule of Depreciation and Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2417412 - Disclosure - Utility Plant and Leases - Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2418413 - Disclosure - Utility Plant and Leases - Supplemental Cash Flow Information Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 2419414 - Disclosure - Utility Plant and Leases - Supplemental Information Related to Leases Included in Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 2420415 - Disclosure - Utility Plant and Leases - Schedule of Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2420415 - Disclosure - Utility Plant and Leases - Schedule of Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2121103 - Disclosure - Revenue link:presentationLink link:calculationLink link:definitionLink 2322303 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 2423416 - Disclosure - Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2424417 - Disclosure - Revenue - Schedule of Gas Operating Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 2425418 - Disclosure - Revenue - Summary of Revenue Disaggregated by Service Type, and Contract Type (Details) link:presentationLink link:calculationLink link:definitionLink 2426419 - Disclosure - Revenue - Summary of Information about Receivables (Details) link:presentationLink link:calculationLink link:definitionLink 2427420 - Disclosure - Revenue - Revenue Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 2427420 - Disclosure - Revenue - Revenue Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 2428421 - Disclosure - Revenue - Schedule of Utility Infrastructure Services Contracts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 2129104 - Disclosure - Receivables and Related Allowances link:presentationLink link:calculationLink link:definitionLink 2330304 - Disclosure - Receivables and Related Allowances (Tables) link:presentationLink link:calculationLink link:definitionLink 2431422 - Disclosure - Receivables and Related Allowances - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 2432423 - Disclosure - Receivables and Related Allowances - Schedule of Accounts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 2433424 - Disclosure - Receivables and Related Allowances - Schedule of Percent of Customers by State (Details) link:presentationLink link:calculationLink link:definitionLink 2434425 - Disclosure - Receivables and Related Allowances - Schedule of Allowance for Uncollectibles (Details) link:presentationLink link:calculationLink link:definitionLink 2135105 - Disclosure - Regulatory Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 2336305 - Disclosure - Regulatory Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 2437426 - Disclosure - Regulatory Assets and Liabilities - Schedule of Regulatory Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2438427 - Disclosure - Regulatory Assets and Liabilities - Schedule of Components of Other Regulatory Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2439428 - Disclosure - Regulatory Assets and Liabilities - Schedule of Components of Other Regulatory Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2140106 - Disclosure - Other Comprehensive Income and Accumulated Other Comprehensive Income ("AOCI") link:presentationLink link:calculationLink link:definitionLink 2341306 - Disclosure - Other Comprehensive Income and Accumulated Other Comprehensive Income ("AOCI") (Tables) link:presentationLink link:calculationLink link:definitionLink 2442429 - Disclosure - Other Comprehensive Income and Accumulated Other Comprehensive Income ("AOCI") - Related Tax Effects Allocated to OCI (Detail) link:presentationLink link:calculationLink link:definitionLink 2443430 - Disclosure - Other Comprehensive Income and Accumulated Other Comprehensive Income ("AOCI") - Narrative (Detail) link:presentationLink link:calculationLink link:definitionLink 2444431 - Disclosure - Other Comprehensive Income and Accumulated Other Comprehensive Income ("AOCI") - AOCI Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 2445432 - Disclosure - Other Comprehensive Income and Accumulated Other Comprehensive Income ("AOCI") - Amount Recognized Before Income Tax Associated with Defined Benefit Plans in Accumulated Other Comprehensive Income (Detail) link:presentationLink link:calculationLink link:definitionLink 2146107 - Disclosure - Common Stock link:presentationLink link:calculationLink link:definitionLink 2347307 - Disclosure - Common Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 2448433 - Disclosure - Common Stock (Detail) link:presentationLink link:calculationLink link:definitionLink 2149108 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 2350308 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 2451434 - Disclosure - Debt - Schedule of Carrying Amounts and Estimated Fair Values of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 2452435 - Disclosure - Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2453436 - Disclosure - Debt - Summary of Effective Interest Rates on Variable-Rate IDRBs (Details) link:presentationLink link:calculationLink link:definitionLink 2454437 - Disclosure - Debt - Estimated Maturities of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 2155109 - Disclosure - Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 2356309 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 2457438 - Disclosure - Share-Based Compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2458439 - Disclosure - Share-Based Compensation - Schedule of Share-Based Plan Compensation Expense, Including Cash Award (Details) link:presentationLink link:calculationLink link:definitionLink 2459440 - Disclosure - Share-Based Compensation - Schedule of Nonvested Performance and Restricted Stock Unit Plans (Details) link:presentationLink link:calculationLink link:definitionLink 2160110 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 2461441 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 2162111 - Disclosure - Pension and Other Postretirement Benefits link:presentationLink link:calculationLink link:definitionLink 2363310 - Disclosure - Pension and Other Postretirement Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 2464442 - Disclosure - Pension and Other Postretirement Benefits - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2465443 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Assumptions Used (Details) link:presentationLink link:calculationLink link:definitionLink 2466444 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Amounts Recognized in Balance Sheet and Income Statement (Details) link:presentationLink link:calculationLink link:definitionLink 2467445 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Accumulated Benefit Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 2468446 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Expected Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 2469447 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Net Periodic Benefit Cost and Weighted-Average Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 2470448 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 2471449 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Fair Value of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2172112 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 2373311 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 2474450 - Disclosure - Income Taxes - Summary of Income Before Taxes and Noncontrolling Interest for Domestic and Foreign Operations (Details) link:presentationLink link:calculationLink link:definitionLink 2475451 - Disclosure - Income Taxes - Summary of Income Tax Expense (Benefit) (Details) link:presentationLink link:calculationLink link:definitionLink 2476452 - Disclosure - Income Taxes - Significant Components of Deferred Income Tax Expense (Benefit) (Details) link:presentationLink link:calculationLink link:definitionLink 2477453 - Disclosure - Income Taxes - Reconciliation of U.S Federal Statutory Rate to Consolidated Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 2478454 - Disclosure - Income Taxes - Summary of Income Before Taxes for Continuing and Discontinued Operations (Details) link:presentationLink link:calculationLink link:definitionLink 2479455 - Disclosure - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 2480456 - Disclosure - Income Taxes - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2481457 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 2182113 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 2383312 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 2484458 - Disclosure - Segment Information - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2485459 - Disclosure - Segment Information - Accounts Receivable for Services (Details) link:presentationLink link:calculationLink link:definitionLink 2486460 - Disclosure - Segment Information - Schedule of Revenues by Geographic Area (Details) link:presentationLink link:calculationLink link:definitionLink 2487461 - Disclosure - Segment Information - Schedule of Segment Reporting Information (Details) link:presentationLink link:calculationLink link:definitionLink 2188114 - Disclosure - Quarterly Financial Data (Unaudited) link:presentationLink link:calculationLink link:definitionLink 2389313 - Disclosure - Quarterly Financial Data (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 2490462 - Disclosure - Quarterly Financial Data (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 2191115 - Disclosure - Redeemable Noncontrolling Interest link:presentationLink link:calculationLink link:definitionLink 2392314 - Disclosure - Redeemable Noncontrolling Interest (Tables) link:presentationLink link:calculationLink link:definitionLink 2493463 - Disclosure - Redeemable Noncontrolling Interest - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 2494464 - Disclosure - Redeemable Noncontrolling Interest- Summary of Redeemable Noncontrolling Interest (Details) link:presentationLink link:calculationLink link:definitionLink