Total Equity and Other Comprehensive Income (Change in Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Total Equity and Other Comprehensive Income
Decrease in net unrealized losses for securities with OTTI charges, Pretax			$ 80
Decrease in net unrealized losses for securities with OTTI charges, Tax (Expense) Benefit			(23)
Decrease in net unrealized losses for securities with OTTI charges, After-tax			57
Less: Net losses realized on sales of securities, Pretax			(34)
Less: Net losses realized on sales of securities, Tax (Expense) Benefit			12
Less: Net losses realized on sales of securities, After-tax			(22)
OTTI credit losses recognized in earnings	(39)	(94)	(73)	(210)
Less: Other OTTI losses realized in net income, Tax (Expense) Benefit			26
Less: Other OTTI losses realized in net income, After-tax			(47)
Change in net unrealized losses on OTTI securities, Pretax			187
Change in net unrealized losses on OTTI securities, Tax (Expense) Benefit			(61)
Change in net unrealized losses on OTTI securities, After-tax			126
Increase in net unrealized gains arising during the period for non-OTTI securities, Pretax			662
Increase in net unrealized gains arising during the period for non-OTTI securities, Tax (Expense) Benefit			(239)
Increase in net unrealized gains arising during the period for non-OTTI securities, After-tax			423
Less: Net gains realized on sales of securities, Pretax			153
Less: Net gains realized on sales of securities, Tax (Expense) Benefit			(54)
Less: Net gains realized on sales of securities, After-tax			99
Change in net unrealized gains on non-OTTI securities, Pretax			509
Change in net unrealized gains on non-OTTI securities, Tax (Expense) Benefit			(185)
Change in net unrealized gains on non-OTTI securities, After-tax			324
Change in net unrealized securities losses, Pretax			696
Change in net unrealized securities losses, Tax (Expense) Benefit			(246)
Change in net unrealized securities losses, After-tax			450
Increase in net unrealized gains during the period on cash flow hedge derivatives, Pretax			280
Increase in net unrealized gains during the period on cash flow hedge derivatives, Tax (Expense) Benefit			(103)
Increase in net unrealized gains during the period on cash flow hedge derivatives, After-tax			177
Less: Net gains realized in net income, Pretax			245
Less: Net gains realized in net income, Tax (Expense) Benefit			(90)
Net gains realized in net income, After-tax			155
Change in net unrealized gains on cash flow hedge derivatives, Pretax			35
Change in net unrealized gains on cash flow hedge derivatives, Tax (Expense) Benefit			(13)
Change in net unrealized gains on cash flow hedge derivatives, After-Tax			22
Change in pension, other postretirement and postemployment benefit plan adjustments, Pretax			11
Change in pension, other postretirement and postemployment benefit plan adjustments, Tax (Expense) Benefit			(4)
Change in pension, other postretirement and postemployment benefit plan adjustments, After-tax			7
Change in other, net Pretax			39
Change in other, net Tax (Expense) Benefit			(18)
Change in other, net After-tax			21
Change in other comprehensive income (loss), Pretax			781
Change in other comprehensive income (loss), Tax (Expense) Benefit			(281)
Change in other comprehensive income (loss), After-tax			$ 500