Investment in Transmission Affiliates - ATC Summarized Financial Data (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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Investment in transmission affiliates | |||||||||||
Operating revenues | $ 1,933.4 | $ 1,651.0 | $ 1,548.7 | $ 2,108.6 | $ 1,947.5 | $ 1,608.0 | $ 1,590.2 | $ 2,377.4 | $ 7,241.7 | $ 7,523.1 | $ 7,679.5 |
Operating expenses | 5,535.6 | 5,991.7 | 6,211.1 | ||||||||
Other expense, net | 276.8 | 271.7 | 238.1 | ||||||||
Current assets | 2,083.0 | 2,093.6 | 2,083.0 | 2,093.6 | |||||||
Noncurrent assets | 34,945.1 | 32,858.2 | 34,945.1 | 32,858.2 | |||||||
Total assets | 37,028.1 | 34,951.8 | 37,028.1 | 34,951.8 | 33,475.8 | ||||||
Current liabilities | 4,148.1 | 3,182.7 | 4,148.1 | 3,182.7 | |||||||
Long-term debt | 11,672.8 | 11,171.4 | 11,672.8 | 11,171.4 | |||||||
Other noncurrent liabilities | 1,229.4 | 1,128.9 | 1,229.4 | 1,128.9 | |||||||
Total liabilities and members' equity | 37,028.1 | 34,951.8 | 37,028.1 | 34,951.8 | |||||||
ATC | |||||||||||
Investment in transmission affiliates | |||||||||||
Operating revenues | 758.1 | 744.4 | 690.5 | ||||||||
Operating expenses | 372.5 | 373.5 | 358.7 | ||||||||
Other expense, net | 110.8 | 110.5 | 108.3 | ||||||||
Net income | 274.8 | 260.4 | $ 223.5 | ||||||||
Current assets | 92.7 | 84.7 | 92.7 | 84.7 | |||||||
Noncurrent assets | 5,400.6 | 5,244.2 | 5,400.6 | 5,244.2 | |||||||
Total assets | 5,493.3 | 5,328.9 | 5,493.3 | 5,328.9 | |||||||
Current liabilities | 310.8 | 502.6 | 310.8 | 502.6 | |||||||
Long-term debt | 2,512.2 | 2,312.8 | 2,512.2 | 2,312.8 | |||||||
Other noncurrent liabilities | 378.2 | 298.9 | 378.2 | 298.9 | |||||||
Members' equity | 2,292.1 | 2,214.6 | 2,292.1 | 2,214.6 | |||||||
Total liabilities and members' equity | $ 5,493.3 | $ 5,328.9 | $ 5,493.3 | $ 5,328.9 |
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Total costs of sales and operating expenses for the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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