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Amortizable Intangible Assets and Goodwill
 6 Months Ended
Aug. 01, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortizable Intangible Assets and Goodwill Amortizable Intangible Assets and Goodwill
The components of our amortizable intangible assets are as follows:
 August 1, 2021January 31, 2021
 Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount		Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount
 (In millions)
Acquisition-related intangible assets (1)$3,277 $(1,030)$2,247 $3,280 $(774)$2,506 
Patents and licensed technology709 (478)231 706 (475)231 
Total intangible assets$3,986 $(1,508)$2,478 $3,986 $(1,249)$2,737 
(1)    As of August 1, 2021, acquisition-related intangible assets include the fair value of a Mellanox in-process research and development, or IPR&D, project of $630 million, which has not yet commenced amortization.
Amortization expense associated with intangible assets was $138 million and $275 million for the second quarter and first half of fiscal year 2022, respectively, and $284 million and $291 million for the second quarter and first half of fiscal year 2021, respectively. Future amortization expense related to the net carrying amount of intangible assets, excluding IPR&D, as of August 1, 2021 is estimated to be $275 million for the remainder of fiscal year 2022, $547 million in fiscal year 2023, $424 million in fiscal year 2024, $371 million in fiscal year 2025, $99 million in fiscal year 2026, and $132 million in fiscal year 2027 and thereafter.
There were no changes to the carrying amount of goodwill during the second quarter and first half of fiscal year 2022.