Debt Obligations (Changes in Debt Obligations) (Details) $ in Millions	3 Months Ended
Mar. 31, 2023 USD ($)
Changes in Long-Term Debt Obligations [Roll Forward]
Total long-term debt at beginning of period	$ 4,735
Additions	0
Payments, Foreign Currency Translation and Accretion	27
Total long-term debt at end of period	4,762
Changes In Debt Obligations [Roll Forward]
Total debt obligations at beginning of period	5,399
Additions	565
Payments, Foreign Currency Translation and Accretion	(855)
Total debt obligations at end of period	5,109
2022 Credit Facility
Changes in Long-Term Debt Obligations [Roll Forward]
Unamortized debt issuance expense, beginning balance	(5)
Additions	0
Payments, Foreign Currency Translation and Accretion	0
Unamortized debt issuance expense, ending balance	(5)
2026 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	498
Additions	0
Payments, Foreign Currency Translation and Accretion	0
Long-term debt obligations at end of period	498
2029 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	637
Additions	0
Payments, Foreign Currency Translation and Accretion	9
Long-term debt obligations at end of period	646
2030 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	637
Additions	0
Payments, Foreign Currency Translation and Accretion	8
Long-term debt obligations at end of period	645
2050 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	486
Additions	0
Payments, Foreign Currency Translation and Accretion	1
Long-term debt obligations at end of period	487
2031 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	644
Additions	0
Payments, Foreign Currency Translation and Accretion	0
Long-term debt obligations at end of period	644
2040 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	644
Additions	0
Payments, Foreign Currency Translation and Accretion	0
Long-term debt obligations at end of period	644
2033 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	653
Additions	0
Payments, Foreign Currency Translation and Accretion	9
Long-term debt obligations at end of period	662
2052 Notes \| Senior Notes
Changes in Long-Term Debt Obligations [Roll Forward]
Long-term debt obligations at beginning of period	541
Additions	0
Payments, Foreign Currency Translation and Accretion	0
Long-term debt obligations at end of period	541
Commercial paper
Changes In Short-Term Debt Obligations [Roll Forward]
Short-term debt - commercial paper beginning balance	664
Additions	565
Payments, Foreign Currency Translation and Accretion	(882)
Short-term debt - commercial paper ending balance	$ 347

Changes In Debt Obligations [Roll Forward]

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Changes In Short-Term Debt Obligations [Roll Forward]

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Payments (Accretions) And Other Of Long-Term And Short-Term Debt

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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