Income Taxes - Income Tax Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Income Tax Disclosure [Abstract]
Unrecognized tax benefit liabilities, beginning of period	$ 249.4	$ 224.3	$ 89.3
Increases as a result of tax positions taken during a prior period	3.1	11.4	56.4
Decreases as a result of tax positions taken during a prior period	(15.4)	(14.8)	(1.4)
Increases as a result of tax positions taken during the current period	15.2	29.0	88.8
Decreases related to settlements with tax authorities	(10.2)	(0.1)	(0.8)
Decreases related to lapse of applicable statute of limitations	(6.0)	(0.4)	(8.0)
Unrecognized tax benefit liabilities, end of period	$ 236.1	$ 249.4	$ 224.3