Employee Benefits - Narrative (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
U.S.
Defined Benefit Plan Disclosure [Line Items]
Non-cash settlement charge	$ 0		$ 0	$ 1	$ 0	$ 1
Expected future employer cash contribution	43				43
Other
Defined Benefit Plan Disclosure [Line Items]
Non-cash settlement charge	0	$ 27	0		27	0
Expected future employer cash contribution	14				14
U.K.
Defined Benefit Plan Disclosure [Line Items]
Non-cash settlement charge	0		$ 0		0	$ 0
Expected future employer cash contribution	$ 4				$ 4