Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) - Jun. 30, 2015 - USD ($) $ in Millions		Total
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year		$ 21,890
Remaining Life - 1 - 5 Years		41,113
Remaining Life - 6 - 10 Years		15,030
Remaining Life - 11 - 30 Years		11,980
Remaining Life Over - 30 Years		1,465
Remaining Life - Total Years		91,478
Interest Rate Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	[1]	7,254
Remaining Life - 1 - 5 Years	[1]	35,137
Remaining Life - 6 - 10 Years	[1]	11,030
Remaining Life - 11 - 30 Years	[1]	11,752
Remaining Life Over - 30 Years	[1]	1,213
Remaining Life - Total Years	[1]	$ 66,386
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	[2]	$ 173
Remaining Life - 1 - 5 Years	[2]	168
Remaining Life - 6 - 10 Years	[2]	234
Remaining Life - 11 - 30 Years	[2]	$ 210
Remaining Life Over - 30 Years	[2]
Remaining Life - Total Years	[2]	$ 785
Derivative maturity date		Dec. 01, 2029
Equity Market Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year		$ 14,463
Remaining Life - 1 - 5 Years		5,705
Remaining Life - 6 - 10 Years		3,766
Remaining Life - 11 - 30 Years		18
Remaining Life Over - 30 Years		252
Remaining Life - Total Years		$ 24,204
Credit Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year
Remaining Life - 1 - 5 Years		$ 103
Remaining Life - 6 - 10 Years
Remaining Life - 11 - 30 Years
Remaining Life Over - 30 Years
Remaining Life - Total Years		$ 103

[1] As of June 30, 2015, 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 June 30, 2015, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was December 2029.