Lease Termination and Impairment Charges (Details) $ in Thousands	12 Months Ended
	Feb. 29, 2020 USD ($) location store	Mar. 02, 2019 USD ($) store	Mar. 03, 2018 USD ($) store location
Lease termination and impairment charges
Long-lived assets held and used, impairment charges	$ 38,878	$ 62,115
Number of stores | store	2,461
Operating right-of-use assets	$ 2,903,256
Impairment charges, closed facilities	$ 997	$ 1,377
Number of impaired locations	350	446	373
Impairment charges, other		$ 14,285
Impairment Charges, Total	$ 39,875	63,492	$ 37,873
Retail Sites In Active Status [Member]
Lease termination and impairment charges
Long-lived assets held and used, impairment charges	34,825	$ 46,419	$ 34,782
Carrying value of long-lived assets	$ 965,500
Number of stores | store	2,461
Operating right-of-use assets	$ 2,800,000
Number of impaired locations | store	320	384	306
Retail Sites Previously Impaired [Member]
Lease termination and impairment charges
Long-lived assets held and used, impairment charges	$ 11,449	$ 17,939	$ 7,313
Number of impaired locations | store	274	288	218
ROU assets impairment	$ 6,594
Capital asset impairment	4,855
Retail Sites New, Relocated And Remodeled [Member]
Lease termination and impairment charges
Long-lived assets held and used, impairment charges	$ 11,228	$ 10,595	$ 13,100
Number of impaired locations | store	8	22	28
ROU assets impairment	$ 5,625
Capital asset impairment	$ 5,603
Period considered for impairment of relocated stores	2 years
Other Retail Sites [Member]
Lease termination and impairment charges
Long-lived assets held and used, impairment charges	$ 12,148	$ 17,885	$ 14,369
Number of impaired locations | store	38	74	60
Retail Sites In Closed Status [Member]
Lease termination and impairment charges
Impairment charges, closed facilities	$ 5,050	$ 2,788	$ 3,091
Number of impaired locations | store	30	62	67
Minimum
Lease termination and impairment charges
Period considered for recording impairment charges on the basis of operating loss	2 years
Minimum | Retail Sites New, Relocated And Remodeled [Member]
Lease termination and impairment charges
Period considered for recording impairment charges on the basis of operating loss	2 years
Period considered for impairment of new stores	3 years
Minimum | Other Retail Sites [Member]
Lease termination and impairment charges
Period considered for recording impairment charges on the basis of operating loss	2 years