CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME (UNAUDITED) Statement (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 189	$ 144	$ 668	$ (3,578)
Other comprehensive income (loss):
Net unrealized derivative instrument gains (losses) arising during the periods, net of income taxes of $10, $1, $80 and ($70), respectively	17	1	137	(121)
Reclassification adjustment for net derivative losses included in net income, net of income taxes of $2, $11, $9 and $45, respectively	3	19	16	79
Net unrealized securities gains (losses) arising during the periods, net of income taxes of ($36), $19, $73 and ($107), respectively	(61)	35	127	(184)
Other-than-temporary impairment not recognized in earnings on securities, net of income taxes of $0, $0, ($12) and ($21), respectively	(1)	0	(22)	(35)
Reclassification of net securities gains to net income, net of income taxes of $0, ($7), ($7) and ($41), respectively	(1)	(15)	(13)	(71)
Defined benefit pension plans:
Actuarial loss, net of taxes of ($35), $0, ($35) and $0, respectively	(59)	0	(59)	0
Net prior service credit, net of income taxes of $3, $0, $3 and $0, respectively	4	0	4	0
Amortization of actuarial loss, net of taxes of $1, $1, $2 and $4, respectively	2	2	4	5
Divestitures effective 9/1/14, net of taxes of $13, $0, $13 and $0, respectively	19	0	19	0
Total other comprehensive income (loss), net of income taxes	(77)	42	213	(327)
Total comprehensive income (loss)	$ 112	$ 186	$ 881	$ (3,905)