Financial Instruments Derivative Activities Table (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Credit Default Swap, Selling Protection [Member]
Derivative [Line Items]
Notional value of interest rate swap agreements	$ 8,540	[1]
Long Notional Exposure	390
Short Notional Exposure	1,277	[1]
Equity swaps
Derivative [Line Items]
Long Notional Exposure	1
Short Notional Exposure	12,352
Foreign currency forwards
Derivative [Line Items]
Long Notional Exposure	2
Short Notional Exposure	1,635
Interest rate swap contracts
Derivative [Line Items]
Long Notional Exposure	0
Short Notional Exposure	63
Commodity contracts
Derivative [Line Items]
Long Notional Exposure	39
Short Notional Exposure	$ 279

[1] The short notional amount on our credit swap positions is $8,540 million. Because credit spreads cannot compress below zero, however, our downside short notional exposure is $1,277 million.