Supplemental Balance Sheet and Cash Flow Information - Supplemental Cash Flow Information (Details) - USD ($) $ / shares in Units, $ in Millions				12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in Working Capital [Abstract]
Change in accounts receivable				$ 0	$ (32)	$ 12
Change in inventories				(28)	(56)	50
Change in accounts payable				(22)	66	60
Change in accrued payroll and employee benefits				3	13	7
Change in accrued income taxes				(1)	(2)	(11)
Change in other current assets and liabilities				7	(28)	(14)
Net				(41)	(39)	104
Supplemental Cash Flow Information [Abstract]
Interest paid				96	122	72
Income taxes paid				90	116	136
Purchases of property, plant and equipment included in accounts payable	$ 55	$ 48	$ 43
Non-cash financing activity related to stock compensation plans				15	13	13
Conversion of preferred stock into common stock				0	372	139
Conversion of preferred dividends into common stock				0	3	1
Dividends on preferred stock accrued not paid	$ 0	$ 0	$ 4	$ 0	$ 0	$ 4
Per share preferred dividends not paid	$ 0.00	$ 0.00	$ 1.00	$ 0.00	$ 0.00	$ 1.00