Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 15,225
Remaining Life - 1 - 5 Years	35,989
Remaining Life - 6 - 10 Years	16,877
Remaining Life - 11 - 30 Years	10,354
Remaining Life Over - 30 Years	1,215
Remaining Life - Total Years	79,660
Interest Rate Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	4,232	[1]
Remaining Life - 1 - 5 Years	31,532	[1]
Remaining Life - 6 - 10 Years	11,230	[1]
Remaining Life - 11 - 30 Years	10,207	[1]
Remaining Life Over - 30 Years	1,213	[1]
Remaining Life - Total Years	58,414	[1]
Derivative maturity date	Apr. 01, 2067
Foreign Currency Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	99	[2]
Remaining Life - 1 - 5 Years	110	[2]
Remaining Life - 6 - 10 Years	305	[2]
Remaining Life - 11 - 30 Years	127	[2]
Remaining Life Over - 30 Years		[2]
Remaining Life - Total Years	641	[2]
Derivative maturity date	Apr. 01, 2028
Equity Market Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	10,894
Remaining Life - 1 - 5 Years	4,221
Remaining Life - 6 - 10 Years	5,342
Remaining Life - 11 - 30 Years	20
Remaining Life Over - 30 Years	2
Remaining Life - Total Years	20,479
Credit Risk Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year
Remaining Life - 1 - 5 Years	126
Remaining Life - 6 - 10 Years
Remaining Life - 11 - 30 Years
Remaining Life Over - 30 Years
Remaining Life - Total Years	$ 126

[1] As of March 31, 2014, 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 March 31, 2014, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was April 2028.