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Segment information - Reconciliation from the Adjusted EBITA to the consolidated net income (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2017 CNY (¥)	Mar. 31, 2016 CNY (¥)	Mar. 31, 2015 CNY (¥)
Share-based compensation expense		¥ (15,995)	¥ (16,082)	¥ (13,028)
Amortization of intangible assets	$ (744)	(5,122)	(2,931)	(2,089)
Impairment of goodwill		0	(455)	(175)
Consolidated income from operations	6,981	48,055	29,102	23,135
Interest and investment income, net	1,244	8,559	52,254	9,455
Interest expenses	(388)	(2,671)	(1,946)	(2,750)
Other income, net	884	6,086	2,058	2,486
Income tax expenses	(2,002)	(13,776)	(8,449)	(6,416)
Share of results of equity investees		(5,027)	(1,730)	(1,590)
Net income	$ 5,989	41,226	71,289	24,320
Total segments
Adjusted EBITA		72,289	51,507	40,696
Share-based compensation expense		(11,666)	(11,646)	(9,089)
Amortization of intangible assets		(4,804)	(2,641)	(1,878)
Consolidated income from operations		55,819	37,220	29,729
Unallocated
Adjusted EBITA		(3,117)	(2,937)	(2,269)
Share-based compensation expense		(4,329)	(4,436)	(3,939)
Amortization of intangible assets		(318)	(290)	(211)
Impairment of goodwill			(455)	(175)
Consolidated income from operations		¥ (7,764)	¥ (8,118)	¥ (6,594)

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Amount of adjusted earnings before interest, taxes and amortization ("Adjusted EBITA"), which represents net income before (i) interest and investment income, net, other income, net, interest expense, income tax expenses and share of results of equity investees, and (ii) certain non-cash expenses, consisting of share-based compensation expenses, amortization expenses and impairment of goodwill, which are not reflective of the Company's core operating performance.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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