Related Party Transactions - Significant transactions with associates of the Group and of CMCC Group (Detail) - CNY (¥) ¥ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Disclosure of transactions between related parties [line items]
Right-of-use assets	¥ 74,308
Bank deposits	130,799	¥ 291,887
Prepayments and other current assets	26,708	27,002
Telecommunications services revenue	674,392	670,907	¥ 668,351
Interest and other income	15,560	15,885	15,883
Lease liabilities				¥ 80,207
Associates and joint ventures [member]
Disclosure of transactions between related parties [line items]
Accounts receivable	225	240
Interest receivable	831	829
Right-of-use assets	40,316
Other receivables	9,545	12,518
Financial assets at FVPL	54,490	41,128
Bank deposits	59,205	44,955
Prepayments and other current assets	36	160
Telecommunications services revenue	535	604	828
Property leasing and management services revenue	30	40	99
Interest and other income	6,130	4,083	4,807
Dividend income	2,299	691	847
Related costs for use of tower assets	39,843	37,837	¥ 36,335
Lease liabilities	43,142
Accounts payable	4,708	3,252
Bills payable	356	135
Accrued expenses and other payables	¥ 6,511	¥ 7,301

Accrued expenses and other payables related party transactions.

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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.

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The amounts receivable resulting from related party transactions. [Refer: Related parties [member]]

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The amount of commercial paper issued by the entity.

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The amount of current prepayments and other current assets. [Refer: Other current assets; Current prepayments]

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

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No definition available.

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The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets]

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The amount of interest recognised as a receivable.

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The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

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The amount of leases where the entity was the lessor in related party transactions. [Refer: Related parties [member]]

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The amount of operating lease income. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset.

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The amount receivable by the entity that it does not separately disclose in the same statement or note.

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The amount of dividends recognised as income. Dividends are distributions of profits to holders of equity investments in proportion to their holdings of a particular class of capital.

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The amount of revenue arising from the rendering of telecommunication services. [Refer: Revenue]

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The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

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The amount of short-term deposits held by the entity that are not classified as cash equivalents. [Refer: Cash equivalents]

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The amount of payment due to suppliers for goods and services used in the entity's business.

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