Leases - Supplemental cash flow information related to leases (Details) $ in Thousands	12 Months Ended
	Feb. 29, 2020 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows paid for operating leases	$ 641,709
Operating cash flows paid for interest portion of finance leases	3,276
Financing cash flows paid for principal portion of finance leases	6,313
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 365,192