Statement of Changes in Consolidated Equity (USD $) In Millions, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2010	$ 17,086	$ 55	$ 1,141	$ 7,087	$ 11,149	$ (4,146)	$ (1,675)	$ 3,475
Net income (loss)	805				611			194
Other comprehensive loss	(1,181)						(952)	(229)
Cash dividends declared:
Preferred @ $3.75 per share	(2)				(2)
Common @ $0.12 per share	(129)				(129)
Stock-based compensation (R)	83			83
Common stock issued: compensation plans (R)	22			(172)		194
Issuance of common stock (R)	600		37	563
Distributions	(257)							(257)
Contributions (M)	169							169
Other	(1)							(1)
Balance at Dec. 31, 2011	17,195	55	1,178	7,561	11,629	(3,952)	(2,627)	3,351
Net income (loss)	162				191			(29)
Other comprehensive loss	(848)						(775)	(73)
Cash dividends declared:
Preferred @ $3.75 per share	(2)				(2)
Common @ $0.12 per share	(129)				(129)
Stock-based compensation (R)	67			67
Common stock issued: compensation plans (R)	3			(68)		71
Distributions	(95)							(95)
Contributions (M)	171							171
Other	(1)							(1)
Balance at Dec. 31, 2012	16,523	55	1,178	7,560	11,689	(3,881)	(3,402)	3,324
Net income (loss)	(2,244)				(2,285)			41
Other comprehensive loss	(595)						(257)	(338)
Cash dividends declared:
Preferred @ $3.75 per share	(2)				(2)
Common @ $0.12 per share	(130)				(130)
Stock-based compensation (R)	71			71
Common stock issued: compensation plans (R)	(3)			(122)		119
Distributions	(109)							(109)
Contributions (M)	12							12
Other	(1)							(1)
Balance at Dec. 31, 2013	$ 13,522	$ 55	$ 1,178	$ 7,509	$ 9,272	$ (3,762)	$ (3,659)	$ 2,929