Deferred Revenue - Additional Information (Detail) - CNY (¥) ¥ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Deferred Revenue [Line Items]
Non-refundable prepaid service fees received from customers	¥ 24,654	¥ 22,316
Unredeemed Point Awards [Member]
Disclosure Of Deferred Revenue [Line Items]
Transaction price allocated to performance obligation	40,005	25,754
Unused Data Traffic [Member]
Disclosure Of Deferred Revenue [Line Items]
Transaction price allocated to performance obligation	¥ 11,156	¥ 7,853

The amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Performance obligations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 120
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_120_a&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_TransactionPriceAllocatedToRemainingPerformanceObligations
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant