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PROPERTY AND EQUIPMENT, NET
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT, NET PROPERTY AND EQUIPMENT, NET
Property and equipment was comprised of the following at December 31, 2021 and 2020.
20212020
 (in millions)
Land$17 $19 
Buildings and leasehold improvements1,126 952 
Equipment1,148 1,009 
Computer software3,656 3,514 
5,947 5,494 
Accumulated depreciation(2,874)(3,123)
Property and equipment, net$3,073 $2,371 
Depreciation expense was $640 million in 2021, $528 million in 2020, and $505 million in 2019, including amortization expense for capitalized internally developed and purchased software of $443 million in 2021, $351 million in 2020, and $343 million in 2019.