Retirement Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	$ (208)	$ (200)
Defined contribution expense	37	35	$ 34
Defined benefit pension expense	45	8	12
Other postretirement employee benefit expense			1
Total	82	43	47
Pension settlement loss	27	0	$ 0
United States
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	(22)	(37)
Other
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	(79)	(68)
Germany
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	$ (107)	$ (95)
Pension Plan [Member] | United States
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Funded status of plan	$ (22)	$ (37)
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	50
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Decrease for Settlement	50
Defined Benefit Plan, Benefit Obligation, Benefits Paid	$ 15	$ 21
Pension Plan [Member] | Non-US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Funded status of plan	$ (190)	$ (174)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	16	20
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	(81)	(87)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	12	$ 17
Former Employees [Member] | Pension Plan [Member] | United States
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	65
Defined Benefit Plan, Benefit Obligation, Benefits Paid	15
Pension settlement loss	$ 27