Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Treasury Stock, Value	[1]	$ (5,593)		$ (5,593)		$ (5,422)
Common stock dividends, per share		$ 0.56	$ 0.50	$ 1.56	$ 1.30
Treasury Stock and Other
Treasury Stock, Value		$ (5,693)	$ (4,777)	$ (5,693)	$ (4,777)
Deferred Compensation Equity		(1)	(1)	(1)	(1)
Stockholders' Equity Attributable to Noncontrolling Interest		$ 101	$ 101	$ 101	$ 101	$ 103
Series A Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		$ 1,022.22	$ 1,022.22	$ 3,044.44	$ 3,044.44
Series B Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		1,022.22	1,022.22	3,044.44	3,044.44
Series E Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid					1,468.75
Series F Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		1,406.25	1,406.25	4,218.75	4,218.75
Series G Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		1,262.50	1,262.50	3,787.50	3,787.50
Series H Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		$ 1,281.25	$ 1,281.25	$ 3,843.75	$ 4,285.07

[1] Includes noncontrolling interest of $101 million and $103 million at September 30, 2019 and December 31, 2018, respectively.