Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2012

Commercial Paper and Other Short-Term Borrowings and Long-Term Debt [Abstract]

Summary of long-term debt

(Dollars in millions)	June 30, 2012		December 31, 2011
Senior debt:
Fixed and floating rate Federal Home Loan Bank advances with maturities ranging from January 2013 to February 2016. These notes bear a combined weighted-average rate of 1.64% at June 30, 2012 and 1.75% at December 31, 2011	$	3,000	$	3,625
Floating rate notes due March 2012. These notes, which bear interest at 0.20% above 3-month LIBOR, had a rate of 0.76% at December 31, 2011		—		500
Floating rate notes due June 2014. These notes, which bear interest at 0.95% above 3-month LIBOR, had a rate of 1.42% at June 30, 2012 and 1.48% at December 31, 2011		300		300
Fixed rate 2.125% notes due December 2013		399		399
Fixed rate 3.00% notes due June 2016		698		698
Fixed rate 2.125% notes due June 2017		499		—
Fixed rate 3.50% notes due June 2022		397		—
Note payable:
Fixed rate 6.03% notes due July 2014 (related to consolidated VIE)		8		8
Subordinated debt:
Fixed rate 5.25% notes due December 2013		409		413
Fixed rate 5.95% notes due May 2016		734		741
Total long-term debt	$	6,444	$	6,684