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Leases - Operating lease cost and others (Details) - CNY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Components of operating lease cost
Operating lease cost	¥ 3,018	¥ 2,139
Variable lease cost	7	42
Total operating lease cost	3,025	2,181
Cash payments for operating leases	2,042	2,037
Operating lease assets obtained in exchange for operating lease liabilities	¥ 2,177	¥ 2,671
Weighted average remaining lease term (in years)	10 years 4 months 24 days
Weighted average discount rate (as a percent)	5.40%

X

- Definition

Amount of lease cost recognized by lessee for lease contract.

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No definition available.

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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