Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year		$ 14	$ 14	$ 11
Charged to operations		7	4	4
Credited to operations		(3)	(4)	(5)
Effect of exchange rate changes or Other adjustments		0	0	0
Valuation allowance and reserves, other adjustments		0	0	4	[1]
Balance at end of year		18	14	14
Deferred Tax Valuation Allowance [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year		1	1	7
Charged to operations		0	0	0
Credited to operations		0	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Addition, Recovery		(1)	0	(6)
Effect of exchange rate changes or Other adjustments		0	0	0
Valuation allowance and reserves, other adjustments	[2]	0	0	0
Balance at end of year		$ 0	$ 1	$ 1

[1] Represents the allowance for doubtful accounts reflected in the final purchase price allocations for the 2017 Acquisitions. See note 4.

[2] Inclusive of the effects of acquisitions.