Derivatives and Hedging Derivatives gains (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income on Derivative	$ (23)		$ (18)
Derivatives accounted for as hedges [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:	(8)		(29)
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):	(21)		(11)
Derivatives accounted for as hedges [Member] | Cash Flow Hedging [Member] | Compensation and Benefits [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:	11		4
Derivatives accounted for as hedges [Member] | Cash Flow Hedging [Member] | Other Income [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:	(19)		(33)
Derivatives accounted for as hedges [Member] | Interest rate contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:	0	[1]	0	[1]
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):	0	[2]	0	[2]
Derivatives accounted for as hedges [Member] | Foreign exchange contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:	(8)	[3]	(29)	[3]
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):	(21)	[4]	(11)	[4]
Derivatives accounted for as hedges [Member] | Foreign exchange contracts [Member] | Cash Flow Hedging [Member] | Compensation and Benefits [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):	3		1
Derivatives accounted for as hedges [Member] | Foreign exchange contracts [Member] | Cash Flow Hedging [Member] | Other General Expenses [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):			1
Derivatives accounted for as hedges [Member] | Foreign exchange contracts [Member] | Cash Flow Hedging [Member] | Other Income [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):	18		9
Derivatives accounted for as hedges [Member] | Foreign exchange contracts [Member] | Net Investment Hedges [Member]
Derivative Instruments, Gain (Loss)
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:	0		0
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):	0		0
Derivatives accounted for as hedges [Member] | Foreign exchange contracts [Member] | Fair value hedges
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income on Derivative	0	[5],[6]	(1)	[5],[6]
Amount of Gain (Loss) Recognized in Income on Related Hedged Item	$ 0	[6]	$ 1	[6]

[1] Location of future reclassification from Accumulated Other Comprehensive Loss will be included within Interest Expense

[2] Included within Interest Expense

[3] Location of future reclassification from Accumulated Other Comprehensive Loss will be included within Compensation and benefits ($11 million and $4 million gain for the three months ended March 31, 2014 and 2013, respectively), and Other income ($19 million and $33 million loss for the three months ended March 31, 2014 and 2013, respectively)

[4] Included within Compensation and benefits ($3 million and $1 million loss for the three months ended March 31, 2014 and 2013, respectively), Other general expenses ($1 million loss for the three months ended March 31, 2013), and Other income ($18 million and $9 million loss for the three months ended March 31, 2014 and 2013, respectively)

[5] Included in Interest expense

[6] Relates to fixed rate debt