Pension Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Transitional Payments	$ 2	$ 7
Document Period End Date	Mar. 31, 2020
Liability, Other Retirement Benefits	$ 1		$ 1
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	15
Service cost	2	7
Interest cost	7	9
Expected return on plan assets	(11)	(14)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0	15
Amortization of actuarial losses	2	4
Net periodic benefit cost	$ 0	$ 21