Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Non-controlling Interests
Beginning balance at Dec. 31, 2012	$ 17,268	$ 441	$ 7,495	$ 9,609	$ (476)	$ 0	$ 199
Comprehensive income:
Net (loss) income	1,103			1,096			7
Other comprehensive loss	(28)				(28)
Activity related to stock plans	78	3	75
Repurchase and retirement of common stock	(350)	(6)	(344)
Stock-based compensation cost	115		115
Cash dividends ($0.68 per share)	(267)			(267)
Net activity related to noncontrolling interests	(7)						(7)
Ending balance at Dec. 31, 2013	17,912	438	7,341	10,438	(504)	0	199
Comprehensive income:
Net (loss) income	1,731			1,719			12
Other comprehensive loss	(245)				(245)
Activity related to stock plans	205	5	200
Repurchase and retirement of common stock	(600)	(9)	(591)
Stock-based compensation cost	122		122
Cash dividends ($0.68 per share)	(279)			(279)
Net activity related to noncontrolling interests	(116)		(10)				(106)
Ending balance at Dec. 31, 2014	18,730	434	7,062	11,878	(749)	0	105
Comprehensive income:
Net (loss) income	(1,974)			(1,967)			(7)
Other comprehensive loss	(256)				(256)
Activity related to stock plans	95	3	101			(9)
Stock-based compensation cost	120		120
Cash dividends ($0.68 per share)	(297)			(297)
Net activity related to noncontrolling interests	(36)		(22)				(14)
Ending balance at Dec. 31, 2015	$ 16,382	$ 437	$ 7,261	$ 9,614	$ (1,005)	$ (9)	$ 84