Notes Payable, Long-Term Debt and Capital Lease Obligations - Narrative (Details) - Senior Notes - USD ($) $ in Millions	May 31, 2018	Feb. 28, 2018
4.900% Senior Notes
Debt Instrument [Line Items]
Senior Notes, stated interest rate	4.90%
Estimated fair value of senior notes	$ 306.5
5.625% Senior Notes
Debt Instrument [Line Items]
Senior Notes, stated interest rate	5.625%
Estimated fair value of senior notes	$ 419.5
4.700% Senior Notes
Debt Instrument [Line Items]
Senior Notes, stated interest rate	4.70%
Estimated fair value of senior notes	$ 514.1
3.950% Senior Notes
Debt Instrument [Line Items]
Senior Notes, stated interest rate	3.95%	3.95%
Estimated fair value of senior notes	$ 481.7

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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