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Property and Equipment
 12 Months Ended
Feb. 01, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment, including assets acquired under finance leases, is depreciated using the straight-line method over estimated useful lives or lease terms if shorter. We amortize leasehold improvements purchased after the beginning of the initial lease term over the shorter of the assets' useful lives or a term that includes the original lease term, plus any renewals that are reasonably certain at the date the leasehold improvements are acquired. Depreciation expense for 2019, 2018, and 2017 was $2,591 million, $2,460 million, and $2,462 million, respectively, including depreciation expense included in Cost of Sales. For income tax purposes, accelerated depreciation methods are generally used. Repair and maintenance costs are expensed as incurred. Facility pre-opening costs, including supplies and payroll, are expensed as incurred.

Estimated Useful LivesLife (Years)
Buildings and improvements8-39
Fixtures and equipment2-15
Computer hardware and software2-7

We review long-lived assets for impairment when store performance expectations, events, or changes in circumstances—such as a decision to relocate or close a store or distribution center, discontinue a project, or make significant software changes—indicate that the asset's carrying value may not be recoverable. We recognized impairment losses of $23 million, $92 million, and $91 million during 2019, 2018, and 2017, respectively. The impairment losses primarily resulted from store impairments and planned or completed store closures, and for 2017, also included supply chain changes. For asset groups classified as held for sale, measurement of an impairment loss is based on the excess of the carrying amount of the asset group over its fair value. We estimate fair value by obtaining market appraisals, obtaining valuations from third-party brokers, or using other valuation techniques. Impairments are recorded in Selling, General and Administrative Expenses.