Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Valuation, Market Approach [Member]
Assets:
Foreign currency contracts	$ 3	$ 3
Net investment hedge contracts	21	12
Liabilities:
Foreign currency contracts	4	2
Valuation, Market Approach [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Foreign currency contracts	0	0
Net investment hedge contracts	0	0
Liabilities:
Foreign currency contracts	0	0
Valuation, Market Approach [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Foreign currency contracts	3	3
Net investment hedge contracts	21	12
Liabilities:
Foreign currency contracts	4	2
Valuation, Market Approach [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Foreign currency contracts	0	0
Net investment hedge contracts	0	0
Liabilities:
Foreign currency contracts	0	0
Valuation, Income Approach [Member]
Assets:
Other long-term receivables (insurance settlement agreement note receivable)	34	34
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Other long-term receivables (insurance settlement agreement note receivable)	0	0
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Other long-term receivables (insurance settlement agreement note receivable)	34	34
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Other long-term receivables (insurance settlement agreement note receivable)	$ 0	$ 0