Consolidated Statement of Equity (Unaudited) - 6 months ended Jun. 30, 2017 - USD ($) shares in Millions, $ in Millions	Total	Total Stockholder's Equity	(Accumulated Deficit) Retained Earnings	Common Stock Held in Treasury	Common Stock	Capital in Excess of Par Value	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance (in shares) at Dec. 31, 2016				129	1,574
Balance at Dec. 31, 2016	$ 9,257	$ 6,051	$ (16,540)	$ (3,708)	$ 157	$ 26,690	$ (548)	$ 3,206
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercised and issued stock-based awards (in shares)					3
Exercised and issued stock-based awards	5	5	0		$ 1	4	0	0
Stock-based compensation	40	40	0	$ 0	$ 0	40	0	0
Tender of shares for stock based awards shares				(1)	0
Tender of shares for stock-based awards	(12)	(12)	0	$ (12)	$ 0	0	0	0
Dividends on common stock	1	1	1		0	0	0	0
Dividends to noncontrolling interests	(39)	0			0	0		(39)
Net income attributable to common stockholders	496	496	496	0	0			0
Net income attributable to noncontrolling interests, including discontinued operations	145	0		0	0			145
Other comprehensive income	100	92		$ 0	$ 0	0	92	8
Balance (in shares) at Jun. 30, 2017				130	1,577
Balance at Jun. 30, 2017	$ 9,993	$ 6,673	$ (16,043)	$ (3,720)	$ 158	$ 26,734	$ (456)	$ 3,320