v2.4.0.6
Property and Equipment
12 Months Ended
Jan. 28, 2012
Property and Equipment  
Property and Equipment

13. Property and Equipment

        Property and equipment 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 assured at the date the leasehold improvements are acquired. Depreciation expense for 2011, 2010 and 2009 was $2,107 million, $2,060 million and $1,999 million, respectively. For income tax purposes, accelerated depreciation methods are generally used. Repair and maintenance costs are expensed as incurred and were $666 million in 2011, $726 million in 2010 and $632 million in 2009. Facility pre-opening costs, including supplies and payroll, are expensed as incurred.

 
Estimated Useful Lives
  Life (in years)
 

Buildings and improvements

  8-39

Fixtures and equipment

  3-15

Computer hardware and software

  4-7
 

        Long-lived assets are reviewed for impairment when events or changes in circumstances indicate that the asset's carrying value may not be recoverable. Impairments of $38 million in 2011, $28 million in 2010 and $49 million in 2009 were recorded as a result of the reviews performed. Additionally, due to project scope changes, we wrote off capitalized construction-in-progress costs of $5 million in 2011, $6 million in 2010 and $37 million in 2009.