Summarized Financial Information of Unconsolidated Affiliate Summarized Operations of Unconsolidated Affiliates (Details) - Unconsolidated JV [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Net Sales of Unconsolidated Affiliates	$ 75	$ 78	$ 71
Gross Profit of Unconsolidated Affiliates	17	16	15
Pre-tax Income of Unconsolidated Affiliates	1	3	6
Net Income of Unconsolidated Affiliates	$ 0	$ 2	$ 4