Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan in current year	$ 0.0
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	(0.5)
Expected benefit payments to the plan next fiscal year	7.0
Expected benefit payments to the plan year two	7.0
Expected benefit payments to the plan year three	7.0
Expected benefit payments to the plan year four	8.2
Expected benefit payments to the plan year five	8.2
Restoration Plan
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to the plan next year	0.7
Expected benefit payments to the plan year two	0.7
Expected benefit payments to the plan year three	0.7
Expected benefit payments to the plan year four	0.7
Expected benefit payments to the plan year five	0.7
Retirement Savings Plan401k
Defined Benefit Plan Disclosure [Line Items]
Total cost for company contributions	$ 64.0	$ 63.8	$ 48.5
Equity securities | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Plan assets target allocation	55.00%
Fixed income securities | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Plan assets target allocation	45.00%