Stock And Stock-Based Incentive Plans (Stock Option Activity) (Details) - Stock Option - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding as of beginning of year, Number of Shares	7,869,000
Options granted, Number of Shares	1,601,489	1,745,497	1,955,117
Options exercised, Number of Shares	(2,413,000)
Options forfeited or expired, Number of Shares	(63,000)
Outstanding as of end of year, Number of Shares	6,994,000	7,869,000
Exercisable as of end of year, Number of Shares	3,010,000
Outstanding as of beginning of year, Weighted Average Exercise Price	$ 57.96
Options granted, Weighted Average Exercise Price	78.74
Options exercised, Weighted Average Exercise Price	51.55
Options forfeited or expired, Weighted Average Exercise Price	67.15
Outstanding as of end of year, Weighted Average Exercise Price	64.85	$ 57.96
Exercisable as of end of year, Weighted Average Exercise Price	$ 62.08
Outstanding as of end of year, Weighted Average Remaining Contractual Life (Years)	4 years 3 months 18 days
Exercisable as of end of year, Weighted Average Remaining Contractual Life (Years)	3 years 3 months 18 days
Outstanding as of end of year, Aggregate Intrinsic Value	$ 157,088
Exercisable as of end of year, Aggregate Intrinsic Value	$ 75,935