Consolidated Statements Of Equity (USD $) In Millions, except Share data in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2014	$ 257	$ 3,990	$ 109	$ (404)	$ (294)	$ 3,658
Balance (in shares) at Dec. 31, 2014	1,027,986				25,517	1,002,469
Stock plans		(8)			10	2
Stock plans (in shares)					403
Dividends on common stock		(105)				(105)
Net income			(51)			(51)
Other comprehensive income, net of tax				3		3
Balance at Mar. 31, 2015	$ 257	$ 3,877	$ 58	$ (401)	$ (284)	$ 3,507
Balance (in shares) at Mar. 31, 2015	1,027,986				25,114	1,002,872