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Software (Tables)
12 Months Ended
Dec. 31, 2020
Research and Development [Abstract]  
Software
Intangible assets as of December 31, 2020, consist of the following (in millions):
 CostAccumulated
Amortization
Net
Customer relationships and other$18,586 $(5,024)$13,562 
Finite-lived trademarks511 (189)322 
Indefinite-lived trademarks44 — 44 
Total Intangible assets, net$19,141 $(5,213)$13,928 

Intangible assets as of December 31, 2019, consist of the following (in millions):
 CostAccumulated
Amortization
Net
Customer relationships and other$18,018 $(2,681)$15,337 
Finite-lived trademarks503 (85)418 
Indefinite-lived trademarks43 — 43 
Total Intangible assets, net$18,564 $(2,766)$15,798 
Software as of December 31, 2020 and 2019, consists of the following (in millions):
 20202019
Software from acquisitions$2,077 $1,959 
Capitalized software development costs2,826 2,258 
Purchased software632 603 
5,535 4,820 
Accumulated amortization(2,165)(1,616)
Total Software, net $3,370 $3,204