Derivatives - Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivatives
Hedged Liability, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt
Fixed rate 30-year debenture due 2028
Derivatives
Principal amount	$ 220
Fair value hedges
Derivatives
Carrying Value of the Hedged Liabilities	918	$ 903
Fair value hedges \| Long-term debt
Derivatives
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Value of the Hedged Liabilities	$ (84)	$ (98)

Face (par) amount of debt instrument at time of issuance.

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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.

+ References

No definition available.

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- Definition

Amount of liability hedged in fair value hedging relationship.

+ References

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- Definition

Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk.

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- Definition

Indicates line item in statement of financial position that includes hedged liability.

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