Acquisition and Divestiture Activity (Narrative) (Details) (USD $)	9 Months Ended					9 Months Ended							11 Months Ended	5 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Oct. 26, 2012 Smartstreet [Member]	Sep. 30, 2012 Smartstreet [Member]	Oct. 26, 2012 Core Deposit Intangibles [Member] Smartstreet [Member]	Sep. 30, 2012 RBC Bank Usa Acquisition [Member]	Mar. 02, 2012 RBC Bank Usa Acquisition [Member] Branches		Mar. 02, 2012 RBC Bank Usa Acquisition [Member] Loans [Member]		Mar. 02, 2012 RBC Bank Usa Acquisition [Member] Deposits [Member]		Dec. 09, 2011 Flagstar Branch Acquisition [Member] Branches	Jun. 06, 2011 Bankatlantic Branch Acquisition [Member] Branches
Total Shares Acquired In Acquisition							100.00%
Business Acquisition Cost Of Acquired Entity Purchase Price							$ 3,599,000,000	[1]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net							2,649,000,000	[1],[2]	14,512,000,000	[1],[2]	(18,094,000,000)	[1],[2]
Total Number Branches Acquired							400						27	19
Revenues Excluding Integration Costs						717,000,000
Profit Loss Excluding Integration Costs						198,000,000
Integration Costs		14,000,000				232,000,000
Pending Divestiture Assets				1,000,000,000
Pending Divestiture Deposits				1,000,000,000
Business Acquisition Purchase Price Allocation Assets Acquired													211,800,000	324,900,000
Net cash paid for acquisitiion activity	3,294,000,000	(261,000,000)											169,300,000	256,900,000
Business Acquisition Purchase Price Allocation Property													24,300,000	26,000,000
Business Acquisition Purchase Price Allocation Goodwill Intangible Assets													18,200,000	42,000,000
Business Acquisition Deposits Assumed													210,500,000	324,500,000
Business Acquisition Deposit Premium Paid													0	39,000,000
Business Acquisition Loans Assumed													0	0
Disposal Group Including Discontinued Operation Goodwill			46,000,000
Disposal Group Including Discontinued Operation Intangible Assets Net					13,000,000
Disposal Group Including Discontinued Operation Accrued Income Taxes Payable			$ 32,000,000

[1] The table above has been updated to reflect certain immaterial adjustments, including final purchase price settlement.

[2] These items are considered as non-cash activity for the Consolidated Statement of Cash Flows.