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Pension Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Payment for Pension Benefits $ 1 $ 9
UNITED STATES    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic benefit cost 5 2
UNITED STATES | General and Administrative Expense [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 2 2
UNITED STATES | Other pension (income) expense [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest cost 9 10
Expected return on plan assets (11) (11)
Amortization of net loss 4 0
Amortization of prior service cost 1 1
Additional loss (gain) recognized due to settlements [1] $ 0 $ 2
[1]
Loss is a result of settlement transactions which exceeded the sum of annual service and interest costs for the applicable plan. These losses were recorded in Other pension (income) expense.