Inventory (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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Inventory Disclosure [Abstract] | |||
Fuel oil | $ 37 | $ 73 | |
Coal | 73 | 93 | |
Natural gas | 22 | 21 | |
Spare parts | 195 | 196 | |
Total Inventory | 327 | 383 | |
Inventory [Line Items] | |||
Inventory lower of cost or market adjustment | 29 | $ 0 | $ 2 |
Fuel Oil | |||
Inventory [Line Items] | |||
Inventory lower of cost or market adjustment | $ 29 |
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- Definition Oil Inventory Lower of Cost or Market Adjustment No definition available.
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- Definition Carrying amount as of the balance sheet date of coal, which is a combustible rock or minerals which are extracted from the ground and used as fuel. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying amount as of the balance sheet date of natural gas in storage, which is a mixture of gases (liquefied or otherwise), used for fuel and manufacturing purposes, which is ready for sale. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying amount as of the balance sheet date of petroleum or crude oil. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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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 Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Gross amount of components of assembled products that can be sold directly or indirectly through sales of assembled products. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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