Supplemental Cash Flow Information (Details)-K - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information
Interest paid note repurchase premiums	$ 32	$ 9	$ 12
Decrease (increase) in current assets:
Receivables	(14)	59	18
Inventories	(13)	(26)	(30)
Prepaid expenses and other	(4)	(1)	3
Increase (decrease) in current liabilities:
Accounts payable	100	103	128
Accrued liabilities	21	12	7
Salaries and wages	12	(3)	(2)
U.S. and foreign income taxes	(14)	(27)
Changes in components of working capital, total	88	117	124
Amount of receivables sold.	317	276
Carrying Amount Of Receivables Sold	317	276
Interest paid in cash	227	199	205
Income taxes paid in cash (all non-US)	$ 101	$ 101	$ 128