Contingencies, Commitments and Guarantees (Contingencies - Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 Claims	Dec. 31, 2013 Claims	Dec. 31, 2012 Claims
Minimum
Loss Contingencies
The approximate amount of the aggregate range of reasonably possible losses in excess of amounts accrued for matters as to which an estimate can be made	$ 0
Maximum
Loss Contingencies
The approximate amount of the aggregate range of reasonably possible losses in excess of amounts accrued for matters as to which an estimate can be made	390,000,000
Superfund Site Settlement Agreements [Member]
Loss Contingencies
Number of regulatory matters and other claims	2
Maximum estimate of costs for environmental testing	100,000
Maximum estimate of aggregate costs to resolve matter	1,000,000
Superfund Site Settlement Agreements [Member] | Minimum
Loss Contingencies
Damages Sought	1,000,000
C-Mart, Inc. V. Metropolitan Life Insurance Company, Et Al [Member] | Maximum
Loss Contingencies
Loss Contingency, Estimate of Possible Loss	23,000,000
Asbestos Issue [Member]
Loss Contingencies
Loss Contingency Accrual	$ 690,000,000
Number of regulatory matters and other claims	68,460	67,983	65,812