Interest and Other Income - Summary of Interest and Other Income (Detail) - CNY (¥) ¥ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of interest and other income [abstract]
Interest income from bank deposits	¥ 11,443	¥ 12,884	¥ 14,714
Fair value gains recognized	4,442	2,999	1,291
Interest and other income	¥ 15,885	¥ 15,883	¥ 16,005

Disclosure of interest and other income [abstract]

No definition available.

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- Definition

The amount of income associated with interest and other financing activities of the entity and operating income that the entity does not separately disclose in the same statement or note.

+ References

No definition available.

+ Details

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- Definition

The gains (losses) recognised in profit or loss on the fair value measurement of assets. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph e
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_93_e_i&doctype=Standard
-URIDate 2018-03-16

+ Details

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- Definition

The amount of interest income on deposits. [Refer: Interest income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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