Employee Benefits - Summary of Employer Contributions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Company’s benefit pension plans	$ 23	$ 29
U.K.
Defined Benefit Plan Disclosure [Line Items]
Company’s benefit pension plans	1	3
Other
Defined Benefit Plan Disclosure [Line Items]
Company’s benefit pension plans	6	8
U.S.
Defined Benefit Plan Disclosure [Line Items]
Company’s benefit pension plans	$ 16	$ 18