Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Actual contribution to defined benefit pension plans			$ 8
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	$ 63
Components of net periodic benefit cost:
Settlement			26	$ 0
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	15		15
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	25		25
Other Postretirement Benefits Plan [Member]
Components of net periodic benefit cost:
Service cost	0	$ 0	0	0
Interest cost	1	0	2	1
Expected return on plan assets	0	0	0	0
Settlement	0	0	0	0
Amortization of unrecognized prior service credit	(1)	(1)	(2)	(2)
Amortization of unrecognized loss	0	1	0	1
Net periodic benefit (income) cost	0	0	0	0
Pension Plan [Member] | UNITED STATES
Components of net periodic benefit cost:
Service cost	0	0	0	0
Interest cost	3	2	5	4
Expected return on plan assets	(3)	(4)	(6)	(7)
Settlement	26	0	26	0
Amortization of unrecognized prior service credit	0	0	0	0
Amortization of unrecognized loss	1	1	2	2
Net periodic benefit (income) cost	27	(1)	27	(1)
Pension Plan [Member] | Non-US [Member]
Components of net periodic benefit cost:
Service cost	4	4	9	9
Interest cost	3	3	6	6
Expected return on plan assets	(6)	(7)	(11)	(14)
Settlement	0	0	0	0
Amortization of unrecognized prior service credit	0	0	0	0
Amortization of unrecognized loss	3	2	5	4
Net periodic benefit (income) cost	4	$ 2	$ 9	$ 5
Defined benefit plan settlement with an insurance company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	50
Defined Benefit Plan, Plan Assets, Payment for Settlement	50
Defined benefit plan settlement by lump-sum payment to employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	$ 13