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Debt (Narrative) (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Aug. 31, 2017 | Aug. 31, 2016 | Sep. 29, 2017 | Feb. 28, 2017
Debt Instrument [Line Items] |  |  |  |
Non-recourse notes payable | $ 11,303,502 |  |  | $ 10,742,425
Capitalized interest | 3,700 | $ 5,300 |  |
Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | 1,200,000 |  |  |
Unused capacity | 1,180,000 |  |  |
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 | $ 9,240,000 |  |  |
Debt maturity, end | Oct. 16, 2023 |  |  |
Warehouse facilities |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Non-recourse notes payable | $ 2,060,000 |  |  |
Warehouse Facilities Maximum Borrowing Capacity | 2,900,000 |  |  |
Remaining borrowing capacity | 839,000 |  |  |
Warehouse Facility Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Warehouse Facilities Maximum Borrowing Capacity | 100,000 |  |  |
Warehouse Facility Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Warehouse Facilities Maximum Borrowing Capacity | 1,500,000 |  |  |
Warehouse Facility One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Warehouse Facilities Maximum Borrowing Capacity | $ 1,300,000 |  |  |
Subsequent Event [Member] | Warehouse Facility Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Warehouse Facilities Maximum Borrowing Capacity |  |  | $ 140,000 |

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