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Software (Tables)
12 Months Ended
Dec. 31, 2021
Research and Development [Abstract]  
Schedule of Software
Intangible assets as of December 31, 2021, consist of the following (in millions):
 CostAccumulated
Amortization
Net
Customer relationships$18,410 $(7,141)$11,269 
Trademarks and other509 (239)270 
Total Intangible assets, net$18,919 $(7,380)$11,539 

Intangible assets as of December 31, 2020, consist of the following (in millions):
 CostAccumulated
Amortization
Net
Customer relationships$18,586 $(5,024)$13,562 
Trademarks and other555 (189)366 
Total Intangible assets, net$19,141 $(5,213)$13,928 
Software as of December 31, 2021 and 2020, consists of the following (in millions):
 20212020
Software from acquisitions$2,181 $2,077 
Capitalized software development costs3,286 2,826 
Purchased software728 632 
6,195 5,535 
Accumulated amortization(2,896)(2,165)
Total Software, net $3,299 $3,370