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Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2018	May 31, 2017	Feb. 28, 2018
Debt Instrument [Line Items]
Non-recourse notes payable	$ 11,969,825		$ 11,644,615
Capitalized interest	1,400	$ 1,700
Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	1,200,000
Unused capacity	1,199,600
Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument Face Amount	300,000
Outstanding Balance	300,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Face Amount	500,000
Outstanding Balance	$ 500,000
Finance and capital lease obligation | Minimum
Debt Instrument [Line Items]
Initial lease terms, in years	15 years
Finance and capital lease obligation | Maximum
Debt Instrument [Line Items]
Initial lease terms, in years	20 years
Asset-backed term funding transactions
Debt Instrument [Line Items]
Non-recourse notes payable	$ 9,940,000
Debt maturity, end	Apr. 15, 2025
Warehouse facilities
Debt Instrument [Line Items]
Non-recourse notes payable	$ 2,030,000
Warehouse Facilities Maximum Borrowing Capacity	3,140,000
Remaining borrowing capacity	1,110,000
Warehouse Facility One
Debt Instrument [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	1,300,000
Warehouse Facility Three
Debt Instrument [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	140,000
Warehouse Facility Two
Debt Instrument [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	$ 1,700,000

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
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-Topic 210
-SubTopic 10
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The amount of cash paid during the current period for interest that is capitalized.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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