Defined Benefit Pension Plans - Changes in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Retirement Benefits [Abstract]
Net actuarial gain (loss) and prior service (cost) arising during the period, net of tax	$ 0	$ (1)	$ 0	$ (1)
Amortization of actuarial loss, prior service cost and settlements, net of tax		(4)		(7)
Total amounts recognized in Other comprehensive income	$ 0	$ 3	$ 4	$ 6