Income Taxes (Details 4) - USD ($) $ in Millions	12 Months Ended
Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefit liabilities, beginning of period	$ 39.5	$ 30.4	$ 85.5
Increases as a result of tax positions taken during a prior period	7.5	0.0	0.1
Decreases as a result of tax positions taken during a prior period	(0.1)	(11.5)	(1.2)
Increases as a result of tax positions taken during the current period	43.8	21.3	3.7
Decreases related to settlements with tax authorities	(0.4)	0.0	(54.7)
Decreases related to lapse of applicable statute of limitations	(1.0)	(0.7)	(3.0)
Unrecognized tax benefit liabilities, end of period	$ 89.3	$ 39.5	$ 30.4

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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