Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Treasury Stock, Value	$ 1,124	[1]
Common stock dividends, per share	$ 0.20		$ 0.10
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	384		31
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	141		229
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(590)		(460)
Treasury Stock and Other
Treasury Stock, Value	(1,215)		(727)
Deferred Compensation Equity	(15)		(42)
Stockholders' Equity Attributable to Noncontrolling Interest	$ 106		$ 126
Series A Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,000		$ 1,000
Series B Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,000		$ 1,000
Series E Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,469		$ 1,469
Series F Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,406		$ 0

[1] Includes noncontrolling interest of $106 million and $108 million at March 31, 2015 and December 31, 2014, respectively.