Derivatives and Hedging Activities (Schedule of Fair Value and Related Outstanding Notional Amounts of Derivative Instruments) (Details) In Millions, unless otherwise specified	Mar. 31, 2014 USD ($)		Dec. 31, 2013 USD ($)		Mar. 31, 2014 Designated as hedges [Member] Cash Flow Hedge [Member] Interest Rate Swap [Member] USD ($) transactions	Dec. 31, 2013 Designated as hedges [Member] Cash Flow Hedge [Member] Interest Rate Swap [Member] USD ($)	Mar. 31, 2014 Designated as hedges [Member] Cash Flow Hedge [Member] Interest Rate Swap [Member] Other Assets [Member] USD ($)	Dec. 31, 2013 Designated as hedges [Member] Cash Flow Hedge [Member] Interest Rate Swap [Member] Other Assets [Member] USD ($)	Mar. 31, 2014 Designated as hedges [Member] Cash Flow Hedge [Member] Interest Rate Swap [Member] Other Liabilities [Member] USD ($)	Dec. 31, 2013 Designated as hedges [Member] Cash Flow Hedge [Member] Interest Rate Swap [Member] Other Liabilities [Member] USD ($)	Mar. 31, 2014 Designated as hedges [Member] Fair Value Hedge [Member] Interest Rate Swap [Member] USD ($) transactions	Dec. 31, 2013 Designated as hedges [Member] Fair Value Hedge [Member] Interest Rate Swap [Member] USD ($)	Mar. 31, 2014 Designated as hedges [Member] Fair Value Hedge [Member] Interest Rate Swap [Member] Other Assets [Member] USD ($)	Dec. 31, 2013 Designated as hedges [Member] Fair Value Hedge [Member] Interest Rate Swap [Member] Other Assets [Member] USD ($)	Mar. 31, 2014 Designated as hedges [Member] Fair Value Hedge [Member] Interest Rate Swap [Member] Other Liabilities [Member] USD ($)	Dec. 31, 2013 Designated as hedges [Member] Fair Value Hedge [Member] Interest Rate Swap [Member] Other Liabilities [Member] USD ($)	Mar. 31, 2014 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] USD ($) transactions		Mar. 31, 2014 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] EUR (€)		Dec. 31, 2013 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] USD ($)		Dec. 31, 2013 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] EUR (€)		Mar. 31, 2014 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] Other Assets [Member] USD ($)	Dec. 31, 2013 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] Other Assets [Member] USD ($)	Mar. 31, 2014 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] Other Liabilities [Member] USD ($)	Dec. 31, 2013 Designated as hedges [Member] Net Investment Hedging [Member] Foreign Exchange Forward Contracts [Member] Other Liabilities [Member] USD ($)	Mar. 31, 2014 Not designated as hedges [Member] Interest Rate Swap [Member] USD ($) transactions		Dec. 31, 2013 Not designated as hedges [Member] Interest Rate Swap [Member] USD ($)		Mar. 31, 2014 Not designated as hedges [Member] Interest Rate Swap [Member] Other Assets [Member] USD ($)		Dec. 31, 2013 Not designated as hedges [Member] Interest Rate Swap [Member] Other Assets [Member] USD ($)		Mar. 31, 2014 Not designated as hedges [Member] Interest Rate Swap [Member] Other Liabilities [Member] USD ($)		Dec. 31, 2013 Not designated as hedges [Member] Interest Rate Swap [Member] Other Liabilities [Member] USD ($)		Mar. 31, 2014 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] USD ($) transactions		Mar. 31, 2014 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] CHF	Mar. 31, 2014 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] EUR (€)	Mar. 31, 2014 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] GBP (£)	Mar. 31, 2014 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] SGD	Dec. 31, 2013 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] USD ($)		Dec. 31, 2013 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] CHF	Dec. 31, 2013 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] EUR (€)	Dec. 31, 2013 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] GBP (£)	Dec. 31, 2013 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] SGD	Mar. 31, 2014 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] Other Assets [Member] USD ($)	Dec. 31, 2013 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] Other Assets [Member] USD ($)	Mar. 31, 2014 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] Other Liabilities [Member] USD ($)	Dec. 31, 2013 Not designated as hedges [Member] Foreign Exchange Forward Contracts [Member] Other Liabilities [Member] USD ($)	Mar. 31, 2014 Not designated as hedges [Member] Forward Contracts [Member] USD ($) transactions	Dec. 31, 2013 Not designated as hedges [Member] Forward Contracts [Member] USD ($)	Mar. 31, 2014 Not designated as hedges [Member] Forward Contracts [Member] Other Assets [Member] USD ($)	Dec. 31, 2013 Not designated as hedges [Member] Forward Contracts [Member] Other Assets [Member] USD ($)	Mar. 31, 2014 Not designated as hedges [Member] Forward Contracts [Member] Other Liabilities [Member] USD ($)	Dec. 31, 2013 Not designated as hedges [Member] Forward Contracts [Member] Other Liabilities [Member] USD ($)	Mar. 31, 2014 Not designated as hedges [Member] Interest Rate Lock Commitments [Member] USD ($) transactions		Dec. 31, 2013 Not designated as hedges [Member] Interest Rate Lock Commitments [Member] USD ($)		Mar. 31, 2014 Not designated as hedges [Member] Interest Rate Lock Commitments [Member] Other Assets [Member] USD ($)		Dec. 31, 2013 Not designated as hedges [Member] Interest Rate Lock Commitments [Member] Other Assets [Member] USD ($)		Mar. 31, 2014 Not designated as hedges [Member] Interest Rate Lock Commitments [Member] Other Liabilities [Member] USD ($)		Dec. 31, 2013 Not designated as hedges [Member] Interest Rate Lock Commitments [Member] Other Liabilities [Member] USD ($)		Mar. 31, 2014 Not designated as hedges [Member] When-Issued Forward Contracts [Member] USD ($) transactions	Dec. 31, 2013 Not designated as hedges [Member] When-Issued Forward Contracts [Member] USD ($)
Derivatives, Fair Value [Line Items]
Derivative, notional amount					$ 2,950	$ 2,650					$ 6,686	$ 7,138					$ 33	[1]	€ 24	[1]	$ 35	[1]	€ 26	[1]					$ 446	[2]	$ 796	[2]									$ 43	[3]	6	€ 21	£ 4	2	$ 44	[3]	5	€ 20	£ 6	1					$ 560	$ 693					$ 302	[2]	$ 235	[2]									$ 32	$ 40
Derivative, number of transactions (in transations)					6						218						1		1										1	[2]											9		9	9	9	9											453						1,365	[2]											1
Derivative, other assets (at fair value)	73	[4]	79	[4]			13	18					54	52											0	0							0	[2]	0	[2]																	0	0					1	5							5	[2]	4	[2]
Collateral receivable/payable, other assets (at fair value)	(57)	[5]	(61)	[5]
Total net derivative assets	16		18
Derivative, accrued expenses and other liabilities (at fair value)	8	[4]	7	[4]					1	0					6	6											0	0									0	[2]	0	[2]															0	0					1	1									0	[2]	0	[2]
Collateral receivable/payable, accrued expenses and other liabilities (at fair value)	(8)	[5]	(7)	[5]
Total net derivative liabilities	$ 0		$ 0

[1] The foreign exchange forward contract has a notional amount of EUR 24 million and EUR 26 million as of March 31, 2014 and December 31, 2013, respectively.

[2] Interest rate swaps not designated as hedges and interest rate lock commitments do not have associated master netting arrangements.

[3] The foreign exchange forward contracts have notional amounts of EUR 21 million, GBP 4 million, SGD 2 million, and CHF 6 million as of March 31, 2014, and EUR 20 million, GBP 6 million, SGD 1 million, CHF 5 million as of December 31, 2013.

[4] In addition to the derivatives disclosed in the table, the Company had one outstanding forward contract to purchase when-issued mortgage-backed securities as part of our community reinvestment initiatives. This forward contract had a notional amount of $32 million and $40 million and immaterial fair values as of March 31, 2014 and December 31, 2013, respectively.

[5] Collateral amounts, which consist of both cash and investment securities, are limited to the related derivative asset/liability balance and do not include excess collateral received/pledged.