Income Taxes - Deferred Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Assets
Provisions	$ 39	$ 44
Costs capitalized for tax	1	2
Acquired intangibles	20	12
Tax receivables, principally net operating loss carryforward	74	112
Credits	2	9
Other	3	0
Deferred tax assets before allowances	139	179
Valuation allowances	(125)	(150)
Total	14	29
Liabilities
Property, plant and equipment	(9)	(6)
Distribution taxes	(7)	(8)
Other	0	(2)
Total	(16)	(16)
Net deferred tax liability	$ (2)
Net deferred tax asset (liability)		$ 13