Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified			9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Interest Rate Contract [Member]		Sep. 30, 2013 Foreign Currency Contract [Member]		Sep. 30, 2013 Equity Market Contract [Member]	Sep. 30, 2013 Credit Risk Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 15,142		$ 4,522	[1]	$ 135	[2]	$ 10,485
Remaining Life - 1 - 5 Years	27,797		23,736	[1]	137	[2]	3,798	126
Remaining Life - 6 - 10 Years	15,646		10,284	[1]	243	[2]	5,119
Remaining Life - 11 - 30 Years	9,803		9,592	[1]	189	[2]	22
Remaining Life Over - 30 Years	1,215		1,213	[1]		[2]	2
Remaining Life - Total Years	$ 69,603	$ 61,110	$ 49,347	[1]	$ 704	[2]	$ 19,426	$ 126
Derivative maturity date			Apr. 01, 2067		Apr. 01, 2028

[1] As of September 30, 2013, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was April 2067.

[2] As of September 30, 2013, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was April 2028.