Consolidated Statements of Changes in Shareholders' Equity (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	AOCI [Member]	Noncontrolling Interests [Member]
Beginning balance, Value at Dec. 31, 2012	$ 21,223	$ 2,116	$ 3,499	$ 5,973	$ 10,129	$ (559)	$ 65
Beginning balance, Shares at Dec. 31, 2012			699,728
Add (Deduct):
Net Income	1,141				1,105		36
Net change in AOCI	(301)					(301)
Stock transactions:
In connection with equity awards, Shares			4,929
In connection with equity awards, Values	65		25	40
Shares repurchased in connection with equity awards, Shares			(839)
Shares repurchased in connection with equity awards, Value	(26)		(4)	(22)
In connection with dividend reinvestment plan, Shares			447
In connection with dividend reinvestment plan, Value	15		2	13
In connection with 401(k) plan, Shares			660
In connection with 401(k) plan, Value	22		3	19
In connection with preferred stock offerings	487	487
Cash dividends declared on common stock	(485)				(485)
Cash dividends declared on preferred stock	(80)				(80)
Equity-based compensation expense	85			85
Other, net	(52)			4			(56)
Ending balance, Value at Sep. 30, 2013	22,094	2,603	3,525	6,112	10,669	(860)	45
Ending balance, Shares at Sep. 30, 2013			704,925
Beginning balance, Value at Dec. 31, 2013	22,809	2,603	3,533	6,172	11,044	(593)	50
Beginning balance, Shares at Dec. 31, 2013			706,620
Add (Deduct):
Net Income	1,617				1,557		60
Net change in AOCI	151					151
Stock transactions:
In connection with equity awards, Shares			14,857
In connection with equity awards, Values	298		74	224
Shares repurchased in connection with equity awards, Shares			(2,223)
Shares repurchased in connection with equity awards, Value	(83)		(11)	(72)
Excess tax benefits in connection with equity awards	51			51
In connection with dividend reinvestment plan, Shares			391
In connection with dividend reinvestment plan, Value	15		2	13
In connection with 401(k) plan, Shares			653
In connection with 401(k) plan, Value	25		3	22
Cash dividends declared on common stock	(508)				(508)
Cash dividends declared on preferred stock	(111)				(111)
Equity-based compensation expense	84			84
Other, net	(34)						(34)
Ending balance, Value at Sep. 30, 2014	$ 24,314	$ 2,603	$ 3,601	$ 6,494	$ 11,982	$ (442)	$ 76
Ending balance, Shares at Sep. 30, 2014			720,298