Consolidated Statement of Changes In Shareholders Equity (Unaudited) (USD $) In Millions		Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Comprehensive Income [Member]
Balance at the beginning of period at Dec. 31, 2009			$ 1,565	$ 0	$ 13,795	$ 45	$ (228)
Return of capital on preferred shares issued to CT Financial Services, Inc.					(3)
Employee benefit plans and other					1
Adjustment to initially apply new guidance for consolidation of VIEs, net of tax						1	(246)
Balance at beginning of period, as adjusted						46	(474)
Cash dividends declared on preferred stock						(37)
Net change in unrealized gains (losses), net of tax as applicable on:
Securities available-for-sale, not other-than-temporarily impaired							533
Other-than-temporarily impaired securities available for sale	[1]						69
Other-than-temporarily impaired securities held to maturity	[1]						38
Derivatives designated as cash flow hedges							13
Other comprehensive income, net of tax							653	653
Total shareholders' equity		16,400	1,565	0	13,793	863	179
Comprehensive income
Net income		854				854		854
Other comprehensive income, net of tax							653	653
Comprehensive income								1,507
Balance at the end of period at Jun. 30, 2010		16,400	1,565	0	13,793	863	179
Balance at the beginning of period at Mar. 31, 2010
Net change in unrealized gains (losses), net of tax as applicable on:
Total shareholders' equity		16,400	1,565	0
Comprehensive income
Net income		300
Balance at the end of period at Jun. 30, 2010		16,400	1,565	0
Balance at the beginning of period at Dec. 31, 2010		16,733	1,565	0	13,785	1,536	(153)
Capital contributions from parent					21
Balance at beginning of period, as adjusted						1,536	(153)
Cash dividends declared on preferred stock						(36)
Net change in unrealized gains (losses), net of tax as applicable on:
Securities available-for-sale, not other-than-temporarily impaired							143
Other-than-temporarily impaired securities available for sale	[1]						1
Other-than-temporarily impaired securities held to maturity							11
Adjustment to reverse other-than-temporary impairment on securities held-to-maturity due to deconsolidation of VIE							142
Derivatives designated as cash flow hedges							(18)
Unrecognized actuarial gains, transition obligation and prior service costs relating to pension and postretirement benefits, net of tax							2
Other comprehensive income, net of tax							281	281
Total shareholders' equity		17,560	1,565	0	13,806	2,061	128
Comprehensive income
Net income		561				561		561
Other comprehensive income, net of tax							281	281
Comprehensive income								842
Balance at the end of period at Jun. 30, 2011		17,560	1,565	0	13,806	2,061	128
Balance at the beginning of period at Mar. 31, 2011
Net change in unrealized gains (losses), net of tax as applicable on:
Total shareholders' equity		17,560	1,565	0
Comprehensive income
Net income		82
Balance at the end of period at Jun. 30, 2011		$ 17,560	$ 1,565	$ 0

[1] During the three and six months ended June 30, 2011 there were no OTTI losses on securities recognized in other revenues and no OTTI losses in the non-credit component on securities were recognized in accumulated other comprehensive income (loss). During the three and six months ended June 30, 2010, OTTI losses on securities available-for-sale and held-to-maturity totaling $13 million and $41 million, respectively, were recognized in other revenues and losses in the non-credit component recognized in accumulated other comprehensive income (loss) were not significant.