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Investment securities and fair value disclosure (Details 4) - Contingent consideration and put liability in relation to investments and acquisitions - CNY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Contingent consideration and put liability in relation to investments and acquisitions
Balance at beginning	¥ 326	¥ 117	¥ 104
Repayment	(227)
Additions	1,094	31
Increase (decrease) in fair value	85	178	13
Balance at end	¥ 1,278	¥ 326	¥ 117

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- Definition

Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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