Consolidated Statements of Stockholders Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Securities Exchangeable for Common Stock[Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2010	$ 23,771	$ 0	$ 770		$ (2,665)	$ 6,756	$ 19,907	$ (997)
Treasury shares at Dec. 31, 2010					60,000,000
Shares Beginning Balance at Dec. 31, 2010			770,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued - stock based compensation	172				257	85
Shares repurchased	(308)				(308)
Stock-based compensation	4					4
Net income	2,946						2,946
Other comprehensive income (loss)	40							40
Dividends paid	(567)						(567)
Purchase of subsidiary shares from non-controlling interest	7								7
Spin-off of downstream	(8,906)					5	(9,498)	587
Shares issued - stock based compensation					(6,000,000)
Shares repurchased					12,000,000
Ending Balance at Dec. 31, 2011	17,159	0	770	0	(2,716)	6,680	12,788	(370)	7
Shares Ending Balance at Dec. 31, 2011		0
Treasury shares at Dec. 31, 2011					66,000,000
Shares Beginning Balance at Dec. 31, 2011			770,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued - stock based compensation	89				164	75
Shares repurchased	(8)				(8)
Stock-based compensation	22					22
Net income	1,582						1,582
Other comprehensive income (loss)	(63)							(63)
Dividends paid	(480)						(480)
Purchase of subsidiary shares from non-controlling interest	(7)								(7)
Spin-off of downstream	(11)					(11)
Shares issued - stock based compensation					(3,000,000)
Ending Balance at Dec. 31, 2012	18,283	0	770	0	(2,560)	6,616	13,890	(433)
Shares Ending Balance at Dec. 31, 2012		0
Treasury shares at Dec. 31, 2012	63,000,000				63,000,000
Shares Beginning Balance at Dec. 31, 2012			770,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued - stock based compensation	126				170	44
Shares repurchased	(513)	0			(513)
Stock-based compensation	20					20
Net income	1,753						1,753
Other comprehensive income (loss)	183							183
Dividends paid	(508)						(508)
Shares issued - stock based compensation					(4,000,000)
Shares repurchased					14,000,000
Ending Balance at Dec. 31, 2013	19,344	0	770		(2,903)	6,592	15,135	(250)
Shares Ending Balance at Dec. 31, 2013		$ 0