Debt Debt (Schedule of Funding Vehicles) (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Feb. 28, 2019
Schedule of Funding Vehicles [Line Items]
Non-Recourse Debt	$ 13,613,272	$ 12,535,405
Warehouse Facility One [Member]
Schedule of Funding Vehicles [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	1,400,000
Warehouse Facility Three [Member]
Schedule of Funding Vehicles [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	150,000
Warehouse Facility Two [Member]
Schedule of Funding Vehicles [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	1,950,000
Warehouse Facilities [Member]
Schedule of Funding Vehicles [Line Items]
Warehouse Facilities Maximum Borrowing Capacity	3,500,000
Debt Instrument, Unused Borrowing Capacity, Amount	1,320,000
Non-Recourse Debt	2,180,000
Asset-backed term funding transactions
Schedule of Funding Vehicles [Line Items]
Non-Recourse Debt	$ 11,430,000