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Intangible Assets Acquired Through Business Combinations and Goodwill
 9 Months Ended
Oct. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Acquired Through Business Combinations and Goodwill Intangible Assets Acquired Through Business Combinations and Goodwill
Intangible Assets Acquired Through Business Combinations
Intangible assets acquired through business combinations were as follows (in millions):
Intangible Assets, GrossAccumulated AmortizationIntangible Assets, NetWeighted
Average
Remaining Useful Life (Years)
January 31, 2021Additions and retirements, netOctober 31, 2021January 31, 2021Expense and retirements, netOctober 31, 2021January 31, 2021October 31, 2021October 31, 2021
Acquired developed technology$3,305 $2,374 $5,679 $(1,427)$(624)$(2,051)$1,878 $3,628 3.9
Customer relationships3,510 3,799 7,309 (1,279)(474)(1,753)2,231 5,556 6.9
Other (1)45 300 345 (40)(17)(57)5 288 5.7
Total$6,860 $6,473 $13,333 $(2,746)$(1,115)$(3,861)$4,114 $9,472 5.7
(1) Included in other are in-place leases, trade names, trademarks and territory rights.
Amortization of intangible assets resulting from business combinations for the three months ended October 31, 2021 and 2020 was $508 million and $283 million, respectively, and for the nine months ended October 31, 2021 and 2020 was $1.1 billion and $838 million, respectively.
The expected future amortization expense for intangible assets as of October 31, 2021 was as follows (in millions):
Fiscal Period:
Remaining three months of fiscal 2022$510 
Fiscal 20231,926 
Fiscal 20241,839 
Fiscal 20251,568 
Fiscal 20261,340 
Thereafter2,289 
Total amortization expense$9,472 
Customer Contract Assets Acquired Through Business Combinations
Customer contract assets resulting from business combinations reflect the fair value of future billings of amounts that are contractually committed by acquired companies' existing customers as of the acquisition date. Customer contract assets are amortized over the corresponding assumed contract terms. Customer contract assets resulting from business combinations were $88 million and $42 million as of October 31, 2021 and January 31, 2021, respectively, and are included in other assets on the condensed consolidated balance sheets.
Goodwill
Goodwill represents the excess of the purchase price in a business combination over the fair value of net assets acquired.
The changes in the carrying amounts of goodwill, which is generally not deductible for tax purposes, were as follows (in millions):
Balance as of January 31, 2021$26,318 
Slack21,220 
Acumen337 
Other acquisitions and adjustments (1)76 
Balance as of October 31, 2021$47,951 
(1) Adjustments include measurement period adjustments for business combinations from the prior year and the effect of foreign currency translation.