This element represents the amortization period of capitalized software development costs.

No definition available.

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- Definition

[Line Items] for Capitalized Software Development Costs [Table]

+ References

No definition available.

+ Details

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- Definition

This element represents the maximum contractual term for foreign exchange forward contracts.

+ References

No definition available.

+ Details

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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.

+ References

No definition available.

+ Details

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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- References

No definition available.

+ Details

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Summary of Significant Accounting Policies (Details)	12 Months Ended
Summary of Significant Accounting Policies (Details)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial Instruments
Maximum contractual terms of foreign exchange forward contracts	1 year
Minimum
Capitalized Software Development Costs [Line Items]
Amortization period for capitalized software development costs	6 months
Maximum
Capitalized Software Development Costs [Line Items]
Amortization period for capitalized software development costs	2 years
Apple \| Consolidated net revenues
Concentration Risk [Line Items]
Percentage of concentration risk	15.00%	16.00%	13.00%
Apple \| Consolidated gross receivables
Concentration Risk [Line Items]
Percentage of concentration risk		10.00%
Sony \| Consolidated net revenues
Concentration Risk [Line Items]
Percentage of concentration risk	13.00%	14.00%	13.00%
Sony \| Consolidated gross receivables
Concentration Risk [Line Items]
Percentage of concentration risk	15.00%	17.00%
Google \| Consolidated net revenues
Concentration Risk [Line Items]
Percentage of concentration risk	11.00%	10.00%
Microsoft \| Consolidated gross receivables
Concentration Risk [Line Items]
Percentage of concentration risk		14.00%
NetEase \| Consolidated gross receivables
Concentration Risk [Line Items]
Percentage of concentration risk	12.00%