Commitments (Long-Term Purchase Commitments) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Electricity Purchase Contracts
Long-Term Purchase Commitment [Line Items]
Purchases Under Long Term Contracts	$ 1,156	$ 709	$ 756
Purchase Obligation, Due in Next Twelve Months	1,190
Purchase Obligation, Due in Second Year	873
Purchase Obligation, Due in Third Year	639
Purchase Obligation, Due in Fourth Year	588
Purchase Obligation, Due in Fifth Year	586
Future Commitments Thereafter	5,924
Future Commitments Total	9,800
Fuel Purchase Contracts
Long-Term Purchase Commitment [Line Items]
Purchases Under Long Term Contracts	3,375	2,070	1,573
Purchase Obligation, Due in Next Twelve Months	3,702
Purchase Obligation, Due in Second Year	2,624
Purchase Obligation, Due in Third Year	1,706
Purchase Obligation, Due in Fourth Year	1,099
Purchase Obligation, Due in Fifth Year	1,117
Future Commitments Thereafter	3,134
Future Commitments Total	13,382
Other Purchase Contracts
Long-Term Purchase Commitment [Line Items]
Purchases Under Long Term Contracts	3,602	$ 1,261	$ 1,506
Purchase Obligation, Due in Next Twelve Months	4,642
Purchase Obligation, Due in Second Year	477
Purchase Obligation, Due in Third Year	303
Purchase Obligation, Due in Fourth Year	215
Purchase Obligation, Due in Fifth Year	189
Future Commitments Thereafter	1,515
Future Commitments Total	$ 7,341

The total minimum amount the entity agreed to spend under the long-term purchase commitment

No definition available.

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- Definition

The actual amount the entity purchased under the long-term purchase commitment

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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment, which payments are due after the fifth year following the balance sheet date

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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.

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No definition available.

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- Definition

Amount of purchase arrangement to be paid in fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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No definition available.

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- Definition

Amount of purchase arrangement to be paid in fourth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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No definition available.

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- Definition

Amount of purchase arrangement to be paid in third fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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No definition available.

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