Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 62,459
Remaining Life - 1 - 5 Years	68,201
Remaining Life - 6 - 10 Years	27,165
Remaining Life - 11 - 30 Years	15,604
Remaining Life - Over 30 Years	8,685
Remaining Life - Total Years	182,114	$ 214,672
Interest Rate Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	4,413
Remaining Life - 1 - 5 Years	49,847
Remaining Life - 6 - 10 Years	17,324
Remaining Life - 11 - 30 Years	13,737
Remaining Life - Total Years	$ 85,321
Derivative maturity date	Jun. 15, 2037
Foreign Currency Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 410
Remaining Life - 1 - 5 Years	553
Remaining Life - 6 - 10 Years	1,574
Remaining Life - 11 - 30 Years	1,856
Remaining Life - Over 30 Years	73
Remaining Life - Total Years	$ 4,466
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	$ 57,636
Remaining Life - 1 - 5 Years	17,752
Remaining Life - 6 - 10 Years	8,267
Remaining Life - 11 - 30 Years	11
Remaining Life - Over 30 Years	8,612
Remaining Life - Total Years	92,278
Credit Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life - 1 - 5 Years	49
Remaining Life - Total Years	$ 49