Goodwill and Other Intangible Assets (Residential Mortgage Servicing Rights) (Details) (Mortgage Servicing Rights [Member], Residential Mortgages [Member], USD $) In Millions, unless otherwise specified					9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2012 Fair Value Changes - Time and Payoffs [Member]		Sep. 30, 2011 Fair Value Changes - Time and Payoffs [Member]		Sep. 30, 2012 Fair Value Changes - Other [Member]		Sep. 30, 2011 Fair Value Changes - Other [Member]		Sep. 30, 2012 From Loans Sold with Servicing Retained [Member]	Sep. 30, 2011 From Loans Sold with Servicing Retained [Member]	Sep. 30, 2012 Purchases [Member]	Sep. 30, 2011 Purchases [Member]	Sep. 30, 2012 RBC Bank Usa Acquisition [Member]
Servicing Assets At Fair avlue [Line Items]
Beginning balance - January 1	$ 594	$ 647	$ 684	$ 1,033
Additions													85	94	118	48	16
Changes in Fair Value					(121)	[1]	(122)	[1]	(151)	[2]	(369)	[2]
Ending balance	594	647	684	1,033
Unpaid principal balance of loans serviced for others at March 31	$ 119,246		$ 121,229

[1] Represents decrease in MSR value due to passage of time, including the impact from both regularly scheduled loan principal payments and loans that were paid down or paid off during the period.

[2] Represents MSR value changes resulting primarily from market-driven changes in interest rates, as well as changes in assumptions such as prepayments and servicing costs.