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Defined Benefit Pension Plans - Changes in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Retirement Benefits [Abstract] |  |  |  |
Net actuarial gain (loss) and prior service (cost) arising during the period, net of tax | $ 0 | $ 0 | $ 0 | $ 0
Amortization of actuarial loss, prior service cost and settlements, net of tax | 0 | 1 | 4 | 2
Total amounts recognized in Other comprehensive income | $ 0 | $ 1 | $ 4 | $ 2

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