Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2017	May 31, 2016	Feb. 28, 2017
Debt Instrument [Line Items]
Non-recourse notes payable	$ 11,003,290		$ 10,742,425
Capitalized interest	1,700	$ 2,600
Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	1,200,000
Unused capacity	1,199,300
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
Term Securitizations
Debt Instrument [Line Items]
Non-recourse notes payable	$ 8,980,000
Debt maturity, end	Oct. 16, 2023
Warehouse facilities
Debt Instrument [Line Items]
Non-recourse notes payable	$ 2,020,000
Warehouse Facilities Maximum Borrowing Capacity	2,800,000
Remaining borrowing capacity	778,000
Warehouse Facility Two
Debt Instrument [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	1,500,000
Warehouse Facility One and Three [Member]
Debt Instrument [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	$ 1,300,000