This page uses Javascript. Your browser either doesn't support Javascript or you have it turned off. To see this page as it is meant to appear please use a Javascript enabled browser.
Print Document
View Excel Document
Cover
Document and Entity Information
Financial Statements
Consolidated Statements of Income
Consolidated Statements of Comprehensive Income
Consolidated Statements of Comprehensive Income (Parenthetical)
Consolidated Statements of Cash Flows
Consolidated Balance Sheets
Consolidated Balance Sheets (Parenthetical)
Consolidated Statements of Stockholders' Equity
Consolidated Statements of Stockholders' Equity Consolidated Statements of Stockholders' Equity (Parenthetical)
Notes to Financial Statements
Organization and Basis of Presentation
Summary of Significant Accounting Policies
Earnings Per Share
Acquisitions
Revenue Recognition Revenue Recognition (Notes)
Segment Information
Supplemental Cash Flow Disclosures
Derivative Instruments
Fair Value of Financial Instruments
Investments
Goodwill and Other Intangible Assets
Income Taxes
Long-Term Debt
Short-Term Borrowing
Leases
Stockholders' Equity
Employee Benefit Plans
Share-Based Compensation Plans
Rates and Other Regulatory Activities
Environmental Commitments and Contingencies
Other Commitments and Contingencies
Quarterly Financial Data
Accounting Policies
Summary of Significant Accounting Policies (Policies)
Notes Tables
Summary of Significant Accounting Policies (Tables)
Earnings Per Share (Tables)
Acquisitions Acquisition (Tables)
Acquisitions Divestitures (Tables)
Revenue Recognition Revenue Recognition (Tables)
Segment Information Segment Information (Tables)
Supplemental Cash Flow Disclosures (Tables)
Derivative Instruments (Tables)
Fair Value of Financial Instruments (Tables)
Investments (Tables)
Goodwill and Other Intangible Assets (Tables)
Income Taxes (Tables)
Long-Term Debt (Tables)
Short-Term Borrowing Short-Term Borrowing (Tables)
Leases Leases (Tables)
Stockholders' Equity (Tables)
Employee Benefit Plans (Tables)
Share-Based Compensation Plans (Tables)
Rates and Other Regulatory Activities Summary of Effects of Tax Reform Impact on Regulated Businesses (Tables)
Rates and Other Regulatory Activities Regulatory assets and liabilities (Tables)
Environmental Commitments and Contingencies Environmental Remediation Status (Tables)
Other Commitments and Contingencies Other Commitments and Contingencies (Tables)
Quarterly Financial Data (Tables)
Notes Details
Summary of Significant Accounting Policies - Summary of Property, Plant and Equipment by Classification (Detail)
Summary of Significant Accounting Policies - Additional Information (Detail)
Summary of Significant Accounting Policies - Average Depreciation Rates (Detail)
Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Detail)
Earnings Per Share - Calculations of Basic and Diluted Earnings Per Share (Detail)
Acquisitions - Additional Information (Detail)
Acquisitions Divestitures (Details)
Revenue Recognition Contract Balances (Details)
Revenue Recognition Disaggregation of Revenue (Details)
Revenue Recognition Remaining performance obligations (Details)
Segment Information - Schedule of Segment Reporting Information by Segment (Detail)
Supplemental Cash Flow Disclosures - Cash Paid for Interest and Income Taxes (Detail)
Supplemental Cash Flow Disclosures - Non-Cash Investing and Financing Activities (Detail)
Derivative Instruments - Additional Information (Detail)
Derivative Instruments - Fair Values of Derivative Contracts Recorded in Consolidated Balance Sheets (Detail)
Derivative Instruments - Effects of Gains and Losses from Derivative Instruments (Detail)
Derivative Instruments Volume of Derivative Activity (Details)
Fair Value of Financial Instruments - Additional Information (Detail)
Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)
Fair Value of Financial Instruments Fair Value of Financial Instruments - Summary of Changes in Fair Value of Instruments (Details)
Investments - Additional Information (Detail)
Investments - Schedule of Investment (Detail)
Goodwill and Other Intangible Assets - Additional Information (Detail)
Goodwill and Other Intangible Assets - Schedule of Carrying Value of Goodwill (Detail)
Goodwill and Other Intangible Assets - Schedule of Carrying Value and Accumulated Amortization of Intangible Assets (Detail)
Income Taxes - Additional Information (Detail)
Income Taxes - Schedule of Income Tax Expense (Detail)
Income Taxes - Summary of Reconciliation of Statutory Federal Tax and Effective Income Tax Rates (Detail)
Income Taxes - Schedule of Accumulated Deferred Income Tax Assets and Liabilities (Detail)
Income Taxes - Schedule of Income Tax Expense (Phantoms) (Detail)
Income Taxes - Summary of Reconciliation of Statutory Federal Tax and Effective Income Tax Rates (Phantoms) (Detail)
Income Taxes Federal Tax Reform (Details)
Long-Term Debt - Additional Information (Detail)
Long-Term Debt - Outstanding Long-Term Debt (Detail)
Long-Term Debt - Outstanding Long-Term Debt (Phantoms) (Detail)
Long-Term Debt Annual Maturities (Details)
Long-Term Debt Shelf Arrangements (Details)
Short-Term Borrowing - Additional Information (Detail)
Short-Term Borrowing Short-Term Borrowing - Schedule of Short-Term Debt (Details)
Leases Schedule of Future Minimum Rental Payment for Operating Leases (Details)
Leases Lease Cost Additional (Details)
Leases Leases - Right of Use Asset and Lease Liability Balance Sheet Classification (Details)
Leases Weighted Average Remaining Lease Term Additional Information (Details)
Leases Lease Cash Flows Additional Information (Details)
Stockholders' Equity Additional Details (Details)
Stockholders' Equity Accumulated Other comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Loss (Details)
Stockholders' Equity Accumulated Other Comprehensive Income (loss) - Reclassifications of Accumulated Other Comprehensive Loss (Details)
Employee Benefit Plans - Additional Information (Detail)
Employee Benefit Plans - Schedule of Funded Status of Benefit Obligation and Plan Assets (Detail)
Employee Benefit Plans - Schedule of Amounts Not Yet Reflected in Net Periodic Benefit Cost and Included in Accumulated Other Comprehensive Income Loss or Regulatory Assets (Detail)
Employee Benefit Plans - Schedule of Amounts Not Yet Reflected in Net Periodic Benefit Cost and Included in Accumulated Other Comprehensive Income Loss or Regulatory Assets (Phantoms) (Detail)
Employee Benefit Plans - Schedule of Assets by Investment Type (Detail)
Employee Benefit Plans - Schedule of Asset Allocation Strategy (Detail)
Employee Benefit Plans - Summary of Pension Plan Assets (Detail)
Employee Benefit Plans - Summary of Changes in Fair Value of Level 3 Investments (Detail)
Employee Benefit Plans - Component of Net Periodic Pension Cost (Benefit) (Detail)
Employee Benefit Plans - Amounts in Accumulated Other Comprehensive Income/Loss and Regulatory Asset (Detail)
Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Detail)
Employee Benefit Plans Employee benefit plans phantoms (Details)
Share-Based Compensation - Additional Information (Detail)
Share-Based Compensation Plans - Share-Based Compensation Amounts Included in Net Income (Detail)
Share-Based Compensation Plans - Summary of Stock Activity Non-employee directors (Detail)
Share-Based Compensation Plans - Summary of Stock Activity under SICP - Key employees (Detail)
Share-Based Compensation Plans Shares Withheld and Tax Benefits Associated With Share-Based Payments (Details)
Rates and Other Regulatory Activities - Additional Information (Detail)
Rates and Other Regulatory Activities Regulatory Assets and Liabilities (Details)
Rates and Other Regulatory Activities Federal Tax Reform Impact for Regulated Businesses (Details)
Environmental Commitments and Contingencies - Additional Information (Detail)
Other Commitments and Contingencies - Additional Information (Detail)
Other Commitments and Contingencies Purchase Obligations (Details)
Quarterly Financial Data - Schedule of Quarterly Financial Information (Detail)
Schedule II - Valuation and Qualifying Accounts (Detail)
All Reports
Rendering Log