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Property, Software and Equipment
 12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Property, Software and Equipment Property, Software and Equipment
 
Property, software and equipment consist of the following ($ in millions):
 December 31, 2022December 31, 2021
Computer software$2,224 $1,825 
Building659 1,116 
Computer hardware604 617 
Leasehold improvements467 732 
Furniture and office equipment366 753 
Land178 248 
Property, software and equipment, at cost4,498 5,291 
Less: accumulated depreciation(2,066)(1,900)
Property, software and equipment, net$2,432 $3,391 

Depreciation expense for the years ended December 31, 2022, 2021, and 2020 was $614 million, $565 million, and $487 million, respectively.

During the second quarter of 2022, in connection with the adoption of a more modern, flexible work environment, the Company undertook a real estate optimization initiative to evaluate future real estate needs and downsize its real estate footprint for owned and leased properties. As a result of this evaluation, the Company substantially changed the use or abandoned various properties and assessed for impairment. The Company engaged a third-party real estate specialist to determine the fair value of its owned properties. The valuation primarily considered comparable properties in each market as well as future cash flows.

As a result of the optimization, the Company recognized impairment charges related to owned real estate of $808 million for the year ended December 31, 2022. The Company also recognized impairment on fixed assets related to leased real estate of $242 million for the year ended December 31, 2022. These impairments are primarily related to the Managed Care segment. The remainder of the $1,627 million charge relates to right-of-use (ROU) asset impairments, which is included within other long-term assets on the Consolidated Balance Sheet, refer to Note 11. Leases.