Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 221,802
Remaining Life - 1 - 5 Years	91,928
Remaining Life - 6 - 10 Years	31,400
Remaining Life - 11 - 30 Years	23,532
Remaining Life Over - 30 Years	14,501
Remaining Life - Total Years	383,163
Interest Rate Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	27,214
Remaining Life - 1 - 5 Years	16,713
Remaining Life - 6 - 10 Years	22,487
Remaining Life - 11 - 30 Years	21,431
Remaining Life Over - 30 Years	4,213
Remaining Life - Total Years	$ 92,058
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	$ 252
Remaining Life - 1 - 5 Years	953
Remaining Life - 6 - 10 Years	1,592
Remaining Life - 11 - 30 Years	2,092
Remaining Life Over - 30 Years	42
Remaining Life - Total Years	$ 4,931
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	$ 194,309
Remaining Life - 1 - 5 Years	74,262
Remaining Life - 6 - 10 Years	7,014
Remaining Life - 11 - 30 Years	9
Remaining Life Over - 30 Years	10,246
Remaining Life - Total Years	285,840
Commodity Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	27
Remaining Life - Total Years	27
Credit Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life - 6 - 10 Years	307
Remaining Life - Total Years	$ 307