Common Stock and Stock-Based Awards Plans (Summary Of Stock-Based Awards) (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares outstanding, shares or units, beginning balance | shares	1,057
Granted, shares or units | shares	534
Vested, shares or units | shares	(346)
Forfeited, shares or units | shares	(11)
Non-vested shares outstanding, shares or units, ending balance | shares	1,234
Non-vested outstanding, weighted-average grant date fair value, beginning balance | $ / shares	$ 28.02
Granted, weighted-average grant date fair value | $ / shares	25.97
Vested, weighted-average grant date fair value | $ / shares	28.21
Forfeited, weighted-average grant date fair value | $ / shares	28.34
Non-vested outstanding, weighted-average grant date fair value, ending balance | $ / shares	$ 27.07
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares outstanding, shares or units, beginning balance | shares	542
Granted, shares or units | shares	177
Forfeited, shares or units | shares	(142)	[1]
Non-vested shares outstanding, shares or units, ending balance | shares	577
Non-vested outstanding, weighted-average grant date fair value, beginning balance | $ / shares	$ 28.06
Granted, weighted-average grant date fair value | $ / shares	25.97
Forfeited, weighted-average grant date fair value | $ / shares	27.21	[1]
Non-vested outstanding, weighted-average grant date fair value, ending balance | $ / shares	$ 27.63

[1] Represents target number of units that can vest based on the achievement of the performance goals.