Pension and Other Postretirement Benefits - Schedule of Other Changes Recognized in Other Comprehensive Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 1	$ (8)	$ (11)
Amortization of net actuarial (loss) gain from prior years	(1)	(2)	(2)
Total recognized in other comprehensive income	0	(10)	(13)
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	0	0	0
Amortization of net actuarial (loss) gain from prior years	0	0	1
Total recognized in other comprehensive income	0	0	1
Supplemental Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	0	(4)	(1)
Amortization of net actuarial (loss) gain from prior years	0	0	0
Total recognized in other comprehensive income	$ 0	$ (4)	$ (1)