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Equity Compensation Plans (Schedule Of Stock Options' Intrinsic Value And Remaining Contractual Term) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Share-based Payment Arrangement [Abstract]  
Outstanding - weighted average remaining contractual term (in years) 6 years 7 months 6 days
Vested and expected to vest - weighted average remaining contractual term (in years) 6 years 7 months 6 days
Exercisable - weighted average remaining contractual term (in years) 5 years 1 month 6 days
Outstanding - aggregate intrinsic value $ 471
Vested and expected to vest - aggregate intrinsic value 457
Exercisable - aggregate intrinsic value $ 247