XML 111 R85.htm IDEA: XBRL DOCUMENT v3.3.1.900

COMMITMENTS AND CONTINGENCIES - PROVISION OF LOAN FACILITY AND LITIGATION (Details) - Beijing Security - Beijing Security System Technology ¥ in Thousands	Mar. 13, 2013 CNY (¥)
Provision of loan facility
Loan facility granted	¥ 10,000
Discount rate for market interest rate (as percent)	10.00%

X

- Definition

Maximum lending amount under the loans receivable.

+ References

No definition available.

+ Details

Name:	cmcm_LoanReceivableMaximumLending
Namespace Prefix:	cmcm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The discount percentage applied to the reference rate as stated in the loan facility agreement and used to compute the variable rate on the loan.

+ References

No definition available.

+ Details

Name:	cmcm_MarketInterestRateDiscount
Namespace Prefix:	cmcm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=cmcm_BeijingKingsoftInternetSecuritySoftwareCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CounterpartyNameAxis=cmcm_BeijingKingsoftSecurityManagementSystemTechnologyCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: