Employee Benefits - Components of Net Periodic (Benefit) Cost (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
U.K.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0		$ 0	$ 0	$ 0
Interest cost	21		17	44	33
Expected return on plan assets, net of administration expenses	(34)		(35)	(70)	(69)
Amortization of prior-service cost	0		1	1	2
Amortization of net actuarial loss	8		8	15	16
Net periodic (benefits) cost	(5)		(9)	(10)	(18)
Loss on pension settlement	0		0	0	0
Total net periodic (benefit) cost	(5)		(9)	(10)	(18)
Other
Defined Benefit Plan Disclosure [Line Items]
Service cost	0		0	0	0
Interest cost	4		3	9	6
Expected return on plan assets, net of administration expenses	(8)		(8)	(17)	(16)
Amortization of prior-service cost	0		0	0	0
Amortization of net actuarial loss	3		3	7	7
Net periodic (benefits) cost	(1)		(2)	(1)	(3)
Loss on pension settlement	0		0	0	0
Total net periodic (benefit) cost	(1)		(2)	(1)	(3)
U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	0		0	0	0
Interest cost	17		14	34	28
Expected return on plan assets, net of administration expenses	(27)		(32)	(54)	(64)
Amortization of prior-service cost	0		0	0	0
Amortization of net actuarial loss	17		20	33	39
Net periodic (benefits) cost	7		2	13	3
Loss on pension settlement	0	$ 1	0	1	0
Total net periodic (benefit) cost	$ 7		$ 2	$ 14	$ 3