Stock Benefit Plans (Summary Of The Status Of Restricted Stock Unit And Performance Unit Awards) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock Units
Shares
Beginning balance (in shares)	5,548,462
Granted (in shares)	2,048,576
Vested (in shares)	(3,173,780)
Forfeited (in shares)	(240,563)
Ending balance (in shares)	4,182,695	5,548,462
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 110.86
Granted (in dollars per share)	152.34	$ 120.19	$ 118.20
Vested (in dollars per share)	104.56
Forfeited (in dollars per share)	127.32
Ending balance (in dollars per share)	$ 135.01	$ 110.86
Performance Stock Units
Shares
Beginning balance (in shares)	662,190
Granted (in shares)	212,875
Vested (in shares)	(208,730)
Forfeited (in shares)	(27,357)
Ending balance (in shares)	638,978	662,190
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 114.35
Granted (in dollars per share)	151.00	$ 122.77	$ 127.71
Vested (in dollars per share)	91.12
Forfeited (in dollars per share)	132.57
Ending balance (in dollars per share)	$ 133.36	$ 114.35