Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 175,390
Remaining Life - 1 - 5 Years	83,957
Remaining Life - 6 - 10 Years	30,802
Remaining Life - 11 - 30 Years	23,533
Remaining Life Over - 30 Years	14,841
Remaining Life - Total Years	328,523
Interest Rate Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	19,186
Remaining Life - 1 - 5 Years	21,463
Remaining Life - 6 - 10 Years	21,929
Remaining Life - 11 - 30 Years	21,433
Remaining Life Over - 30 Years	4,213
Remaining Life - Total Years	$ 88,224
Derivative maturity date	Apr. 20, 2067
Foreign Currency Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 222
Remaining Life - 1 - 5 Years	918
Remaining Life - 6 - 10 Years	1,632
Remaining Life - 11 - 30 Years	2,091
Remaining Life Over - 30 Years	42
Remaining Life - Total Years	$ 4,905
Derivative maturity date	Jun. 16, 2061
Equity Market Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 155,955
Remaining Life - 1 - 5 Years	61,524
Remaining Life - 6 - 10 Years	7,241
Remaining Life - 11 - 30 Years	9
Remaining Life Over - 30 Years	10,586
Remaining Life - Total Years	235,315
Credit cContracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life - 1 - 5 Years	52
Remaining Life - Total Years	52
Commodity Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	27
Remaining Life - Total Years	$ 27