Employee Benefits (Amounts Recognized In The Consolidated Statement Of Condition) (Details) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Primary U.S. And Non-U.S. Defined Benefit Plans [Member]	Dec. 31, 2011 Primary U.S. And Non-U.S. Defined Benefit Plans [Member]	Dec. 31, 2012 Post-Retirement Plan [Member]	Dec. 31, 2011 Post-Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current assets				$ 40	$ 45	$ 0	$ 0
Current liabilities				(1)	(1)	(8)	(6)
Noncurrent liabilities				(93)	(133)	(124)	(106)
Net accrued amount recognized in statement of condition				(54)	(89)	(132)	(112)
Prior service credit				0	0	3	3
Net loss				(365)	(307)	(49)	(36)
Accumulated other comprehensive gain (loss)	360	(659)	(689)	(365)	(307)	(46)	(33)
Cumulative employer contributions in excess of net periodic benefit cost				311	218	(86)	(79)
Net obligation recognized in consolidated statement of condition				(54)	(89)	(132)	(112)
Accumulated benefit obligation				$ 1,105	$ 999	$ 0	$ 0
Used to determine benefit obligations, Discount rate				3.75%	4.50%	3.75%	4.50%
Used to determine periodic benefit cost, Discount rate				4.50%	5.50%	4.50%	5.50%
Used to determine periodic benefit cost, Rate of increase for future compensation				0.00%	4.50%	0.00%	0.00%
Used to determine periodic benefit cost, Expected long-term rate of return on plan assets				6.75%	7.25%	0.00%	0.00%
Assumed health care cost trend rates, Cost trend rate assumed for next year				0.00%	0.00%	8.08%	7.80%
Assumed health care cost trend rates, Rate to which the cost trend rate is assumed to decline				0.00%	0.00%	4.50%	4.50%
Assumed health care cost trend rates, Year that the rate reaches the ultimate trend rate						2029	2029