Investment In Non-Consolidated Affiliates (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Minimum Percentage of Ownership in Investments for Consolidation					50.00%
Loss on sale of equity method investment	$ 0	$ 0	$ 0	$ 11	$ 11	$ 0	$ 0
Turkey JVs [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value In Excess Of Fair Value	$ 37				$ 37	43
Percentage of investment in affiliates	50.00%				50.00%
Purchase of inventory from joint venture					$ 144	180	152
Sale of inventory to joint venture					56	45	$ 44
Net accounts payable						$ 5
Equity Method Investment Summarized Financial Information Accounts Receivable	$ 3				$ 3
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of investment in affiliates	2.00%				2.00%	2.00%