Pension Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Foreign Plan [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	$ 3	$ 3
Interest cost	5	5
Expected return on plan assets	(5)	(5)
Amortization of prior service cost	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	(1)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	2	0
Total pension cost	6	3
Defined Benefit Pension Contributions Disclosure [Abstract]
Pension employer contributions	3
Pension estimated future employer contributions remainder of fiscal year	9
US and Utilities [Domain]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	4	3
Interest cost	10	10
Expected return on plan assets	(16)	(17)
Amortization of prior service cost	1	1
Defined Benefit Plan, Amortization of Gain (Loss)	(5)	(5)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	1	4
Total pension cost	5	$ 6
Defined Benefit Pension Contributions Disclosure [Abstract]
Pension employer contributions	38
Pension estimated future employer contributions remainder of fiscal year	$ 0