v3.20.4
Amortizable Intangible Assets
 12 Months Ended
Jan. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortizable Intangible Assets Amortizable Intangible Assets
The components of our amortizable intangible assets are as follows:
 January 31, 2021January 26, 2020
 
Gross
Carrying
Amount
Accumulated
Amortization		Net 
Carrying
Amount
Gross
Carrying
Amount
Accumulated
Amortization		Net 
Carrying
Amount
 (In millions)(In millions)
Acquisition-related intangible assets (1)$3,280 $(774)$2,506 $195 $(192)$3 
Patents and licensed technology706 (475)231 520 (474)46 
Total intangible assets$3,986 $(1,249)$2,737 $715 $(666)$49 
(1)    As of January 31, 2021, acquisition-related intangible assets include the fair value of a Mellanox IPR&D project of $630 million, which has not been amortized. Once the project reaches technological feasibility, we will begin to amortize the intangible asset over its estimated useful life. Refer to Note 2 of these Notes to the Consolidated Financial Statements for further details.
Amortization expense associated with intangible assets for fiscal years 2021, 2020, and 2019 was $612 million, $25 million, and $29 million, respectively. Future amortization expense related to the net carrying amount of intangible assets as of January 31, 2021 is estimated to be $548 million in fiscal year 2022, $545 million in fiscal year 2023, $423 million in fiscal year 2024, $367 million in fiscal year 2025, $97 million in fiscal year 2026, and $757 million in fiscal year 2027 and thereafter.