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Investment in equity investees (Details) - CNY (¥) ¥ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Measurement Alternative and NAV practical expedient investments
Carrying amount of investment under NAV practical expedient	¥ 7,325	¥ 6,712
Carrying values of equity investments measured at fair value using the Measurement Alternative	19,643	21,624
Measurement alternative and NAV practical expedient investments	¥ 4,787	¥ 10,201	¥ 6,198

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- Definition

Amount of alternative investments, over which the Group do not have the ability to exercise significant influence, and are accounted for under the existing practical expedient in ASC Topic 820, Fair Value Measurements and Disclosures ("ASC 820") to estimate fair value using the net asset value per share (or its equivalent) of the investment ("NAV practical expedient").

+ References

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- Definition

Original cost of investment in equity security without readily determinable fair value and NAV practical expedient investments.

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- Definition

Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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