Consolidated Statement of Equity (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($) shares in Millions, $ in Millions	Total	Total Stockholder's Equity	Accumulated Deficit	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)					4
Exercised and issued stock-based awards	5	5	0		$ 1	4	0	0
Stock-based compensation	49	49	0	$ 0	$ 0	49	0	0
Stock Issued During Period, Shares, Issued for Services				0
Tender of shares for stock based awards shares				(1)	0
Tender of shares for stock-based awards	(14)	(14)	0	$ (14)	$ 0	0	0	0
Dividends	(66)	1	1		0	0	0
Dividends to noncontrolling interests								(67)
Net income attributable to common stockholders	776	776	776	0	0			0
Net income attributable to noncontrolling interests, including discontinued operations	110	0		0	0			110
Other comprehensive income	113	105		$ 0	$ 0	0	105	8
Balance (in shares) at Sep. 30, 2017				130	1,578
Balance at Sep. 30, 2017	$ 10,230	$ 6,973	$ (15,763)	$ (3,722)	$ 158	$ 26,743	$ (443)	$ 3,257