Retirement Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amortization of net losses expected in next year	$ 14
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	3	$ 3	$ 3
Amortization of unrecognized prior service (credit) cost	(4)	(4)	(4)
Amortization of unrecognized loss	1	1	2
Net periodic benefit cost			1
Amortization of net losses expected in next year	1
Amortization of net prior service cost expected in the next year	3
United States | Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	8	9	9
Expected return on plan assets	(11)	(14)	(13)
Settlements, curtailments and other	27	0
Amortization of unrecognized prior service (credit) cost	(1)	(1)	(1)
Amortization of unrecognized loss	4	4	4
Net periodic benefit cost	27	(2)	(1)
Non-US [Member] | Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	18	18	18
Interest cost	12	12	11
Expected return on plan assets	(22)	(27)	(24)
Settlements, curtailments and other	1	0
Amortization of unrecognized prior service (credit) cost	0	0
Amortization of unrecognized loss	9	7	8
Net periodic benefit cost	$ 18	$ 10	$ 13