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Debt and Credit Agreements - Schedule of Interest Rate Derivatives (Details) - USD ($) | Sep. 30, 2023 | Dec. 31, 2022 | Mar. 31, 2022
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Fixed-to-Floating Interest Rate Swap | Fair Value Hedging | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Cumulative Fair Value Adjustment to Hedged Notes | $ (159,000,000) | $ (118,000,000) |
Carrying Amount of Hedged Notes | 641,000,000 | 682,000,000 |
Fixed Rate Notes Due Between 2036 and 2040 |  |  |
Derivative [Line Items] |  |  |
Notional Value of Hedged Notes | $ 800,000,000 | $ 800,000,000 | $ 800,000,000

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