Consolidated Statements Of Equity - USD ($) $ in Millions	Total	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2012	$ 37,000	$ 5,536	$ 4,855	$ 14	$ 23,834	$ 10,057	$ (8,052)	$ 756
Net income	5,331					5,346		(15)
Other comprehensive income (loss)	4,921						4,939	(18)
Purchase, redemption and cancellation of Series A preferred stock	(2,427)	(2,427)
Exercise of common stock warrants	3				3
Stock based compensation	75				75
Mandatory conversion of Series B Preferred Stock into common stock	0		(4,855)
Mandatory conversion of Series B Preferred Stock into common stock			4,854	1	4,854
Cash dividends on Series A Preferred Stock, charge related to purchase of Series A Preferred Stock and dividends on Series B Preferred Stock	(1,587)					(1,587)
Dividends declared or paid to noncontrolling interests	(82)							(82)
Other	(60)				14			(74)
Balance at Dec. 31, 2013	43,174	3,109	$ 0	15	28,780	13,816	(3,113)	567
Net income	4,018					3,949		69
Other comprehensive income (loss)	(4,983)						(4,960)	(23)
Purchase, redemption and cancellation of Series A preferred stock	(3,109)	(3,109)
Purchase of common stock	(168)				(85)	(83)
Exercise of common stock warrants	39			1	38
Stock based compensation	189				206	(17)
Cash dividends paid on Series A Preferred Stock and charge related to redemption of Series A Preferred Stock	(1,160)					(1,160)
Cash dividends paid on common stock	(1,928)					(1,928)
Dividends declared or paid to noncontrolling interests	(73)							(73)
Other	25				(2)			27
Balance at Dec. 31, 2014	36,024	$ 0		16	28,937	14,577	(8,073)	567
Net income	9,615					9,687		(72)
Other comprehensive income (loss)	56						37	19
Purchase of common stock	(3,520)			(1)	(1,745)	(1,774)
Exercise of common stock warrants	46				46
Stock based compensation	338				369	(31)
Cash dividends paid on common stock	(2,174)					(2,174)
Dividends declared or paid to noncontrolling interests	(75)							(75)
Other	13							13
Balance at Dec. 31, 2015	$ 40,323			$ 15	$ 27,607	$ 20,285	$ (8,036)	$ 452