Employee Benefit Plans - Funded Status of Defined Benefit Pension Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in projected benefit obligations:
Interest cost	$ (16,000,000)	$ (20,000,000)	$ (9,000,000)
U.K. plan
Change in projected benefit obligations:
Plan benefit obligations, beginning balance	(777,000,000)	(672,000,000)
Interest cost	(11,000,000)	(14,000,000)
Settlements	16,000,000	0
Actuarial gain (loss)	15,000,000	(93,000,000)
Benefits paid	21,000,000	30,000,000
Foreign currency translation	0	(28,000,000)
Plan benefit obligations, ending balance	(736,000,000)	(777,000,000)	(672,000,000)
Change in fair value of plan assets:
Fair value of plan assets, beginning balance	974,000,000	860,000,000
Actual return on plan assets	47,000,000	110,000,000
Company contribution	0	0
Settlements	(16,000,000)	0
Benefits paid	(21,000,000)	(30,000,000)
Foreign currency translation	(1,000,000)	34,000,000
Fair value of plan assets, ending balance	983,000,000	974,000,000	860,000,000
Funded status of the plans	247,000,000	197,000,000
U.S. and other plans
Change in projected benefit obligations:
Plan benefit obligations, beginning balance	(238,000,000)	(225,000,000)
Interest cost	(5,000,000)	(6,000,000)
Settlements	0	0
Actuarial gain (loss)	9,000,000	(18,000,000)
Benefits paid	12,000,000	13,000,000
Foreign currency translation	1,000,000	(2,000,000)
Plan benefit obligations, ending balance	(221,000,000)	(238,000,000)	(225,000,000)
Change in fair value of plan assets:
Fair value of plan assets, beginning balance	181,000,000	167,000,000
Actual return on plan assets	14,000,000	22,000,000
Company contribution	0	5,000,000
Settlements	0	0
Benefits paid	(12,000,000)	(13,000,000)
Foreign currency translation	0	0
Fair value of plan assets, ending balance	183,000,000	181,000,000	$ 167,000,000
Funded status of the plans	$ (38,000,000)	$ (57,000,000)