Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Treasury Stock, Value	[1]	$ (1,900)	$ (1,900)
Treasury Stock and Other
Treasury Stock, Value		(2,003)	(2,003)	$ (1,379)
Deferred Compensation Equity		0	0	(11)
Stockholders' Equity Attributable to Noncontrolling Interest		$ 103	$ 103	$ 108
Additional Paid-in Capital [Member]
Common stock dividends, per share			$ 0.48	$ 0.44
Series A Preferred Stock [Member] | Additional Paid-in Capital [Member]
Preferred Stock, Dividends, Per Share, Cash Paid			2,033	2,022
Series B Preferred Stock [Member] | Additional Paid-in Capital [Member]
Preferred Stock, Dividends, Per Share, Cash Paid			2,033	2,022
Series E Preferred Stock [Member] | Additional Paid-in Capital [Member]
Preferred Stock, Dividends, Per Share, Cash Paid			2,938	2,938
Series F Preferred Stock [Member] | Additional Paid-in Capital [Member]
Preferred Stock, Dividends, Per Share, Cash Paid			$ 2,813	$ 3,406
Reclassifications from Additional paid in capital [Member] | Additional Paid-in Capital [Member]
New Accounting Pronouncement or Change in Accounting Principle, Indirect Effects		-6

[1] Includes noncontrolling interest of $103 million and $108 million at June 30, 2016 and December 31, 2015, respectively.