Mortgage Servicing Assets (Tables)

6 Months Ended

Jun. 30, 2011

Mortgage Servicing Assets (Tables) [Abstract]

Changes in the carrying amount of mortgage servicing assets

		Six months ended June 30,
in millions	2011			2010
Balance at beginning of period	$	196		$	221
Servicing retained from loan sales		11			3
Purchases		2			7
Amortization		(29	)		(22	)
Balance at end of period	$	180		$	209
Fair value at end of period	$	247		$	307