Premises and Equipment
Premises and equipment, including leasehold improvements, are carried at cost less accumulated depreciation. Costs incurred during construction are capitalized and are depreciated once an asset is placed in service. Depreciation is generally computed using the straight-line method over the estimated useful lives of assets, which range from 3 to 10 years for equipment, furniture and building improvements. Premises are depreciated based upon their estimated useful life at the acquisition date, which generally ranges from 30 to 50 years.
Leasehold improvements are depreciated using the straight-line method over the lesser of the remaining term of the leased facility or the economic life of the improvement, which ranges from 5 to 10 years. The Company maintains operating leases worldwide for facilities and equipment. Rent expense for facility leases is recognized ratably over the lease term, and includes adjustments for rent concessions, rent escalations and leasehold improvement allowances. The Company recognizes lease restoration obligations at the fair value of the restoration liabilities when incurred, and amortizes the restoration assets over the lease term.