Investments in equity method investees - General (Details) ¥ in Millions, $ in Millions	12 Months Ended
Mar. 31, 2025 CNY (¥)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 CNY (¥)
Investments in equity method investees
Balance as of beginning of period	¥ 203,131		¥ 207,380
Additions	3,827		3,605
Share of results, other comprehensive income and other reserves	8,794		2,739
Disposals	(2,606)		(1,069)
Distributions	(3,906)		(1,258)
Transfers	3,559		32
Impairment loss	(2,723)		(9,895)
Foreign currency translation adjustments	93		1,597
Balance as of end of period	¥ 210,169	$ 28,962	¥ 203,131

No definition available.

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- Definition

Purchases of and additional investments in equity method investments during the period.

+ References

No definition available.

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- Definition

The carrying value of equity method investments disposed of during the period.

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in equity method investments due to the effect of foreign currency translation adjustments.

+ References

No definition available.

+ Details

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- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee to which the equity method of accounting is applied. This item also includes share of results, other comprehensive income (loss) and other reserves related to equity method investees.

+ References

No definition available.

+ Details

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- Definition

The carrying value of equity method investments transferred in or out during the period.

+ References

No definition available.

+ Details

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- Definition

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Topic 230
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-Publisher FASB
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-Publisher FASB
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- Definition

Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481664/323-10-45-1

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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