Financial Instruments Derivative Activities Table (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Credit default swaps [Member]
Primary underlying risk:
Long Notional Exposure	$ 8
Short Notional Exposure	0
Equity swaps [Member]
Primary underlying risk:
Long Notional Exposure	4
Short Notional Exposure	9,340
Foreign currency fowards [Member]
Primary underlying risk:
Long Notional Exposure	77
Short Notional Exposure	1,428
Interest rate swap contracts [Member]
Primary underlying risk:
Long Notional Exposure	1,253
Short Notional Exposure	0
Commodity contracts [Member]
Primary underlying risk:
Long Notional Exposure	81
Short Notional Exposure	$ 7

Financial Instruments Derivative Activities Table (Details) (USD $)
In Millions, unless otherwise specified

Jun. 30, 2012

Credit default swaps [Member]

$ 8

Equity swaps [Member]

9,340