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Intangible assets, net - General (Details) ¥ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 CNY (¥) | Mar. 31, 2021 CNY (¥) | Mar. 31, 2020 CNY (¥) | Mar. 31, 2022 USD ($)
Intangible assets, net |  |  |  |
Gross carrying amount | ¥ 116,929 | ¥ 131,217 |  |
Less: accumulated amortization and impairment | (57,698) | (60,384) |  |
Net book value | 59,231 | 70,833 |  | $ 9,343
Intangible assets acquired | 1,000 | 20,750 | ¥ 5,626 |
User base and customer relationships |  |  |  |
Intangible assets, net |  |  |  |
Gross carrying amount | 47,941 | 50,066 |  |
Trade names, trademarks and domain names |  |  |  |
Intangible assets, net |  |  |  |
Gross carrying amount | 39,080 | 39,440 |  |
Non-compete agreements |  |  |  |
Intangible assets, net |  |  |  |
Gross carrying amount | 14,436 | 19,445 |  |
Developed technology and patents |  |  |  |
Intangible assets, net |  |  |  |
Gross carrying amount | 7,088 | 12,855 |  |
Licenses copyrights and others |  |  |  |
Intangible assets, net |  |  |  |
Gross carrying amount | ¥ 8,384 | ¥ 9,411 |  |

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- Definition Accumulated amount of amortization of assets and the amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value, excluding financial assets and goodwill, lacking physical substance with a finite life. + References No definition available. + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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