Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Mar. 02, 2019
Deferred tax assets:
Accounts receivable	$ 29,734	$ 36,607
Accrued expenses	99,637	107,356
Liability for lease exit costs	772	37,333
Pension, retirement and other benefits	98,408	87,397
Long-lived assets	303,630	320,561
Operating lease liabilities	903,020
Credits	35,197	48,884
Net operating losses	1,284,831	1,084,139
Other	654
Total gross deferred tax assets	2,755,883	1,722,277
Valuation allowance	(1,673,119)	(1,091,416)
Total deferred tax assets	1,082,764	630,861
Deferred tax liabilities:
Outside basis difference	5,616	5,392
Inventory	242,238	215,588
Operating lease right of use assets	818,230
Other		797
Total gross deferred tax liabilities	1,066,084	221,777
Net deferred tax assets	$ 16,680	$ 409,084