Guarantees (Tables)

12 Months Ended

Dec. 31, 2014

Guarantees [Abstract]

Mortgage Loan Repurchase Losses

	Year Ended December 31
(Dollars in millions)	2014			2013			2012
Balance at beginning of period		$78			$632			$320
Repurchase provision	12			114			713
Charge-offs, net of recoveries	(5		)	(668		)	(401		)
Balance at end of period		$85			$78			$632