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