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Investments (Cost Method Investments) (Details) - USD ($) $ in Millions | 1 Months Ended |
--- | --- | ---
Feb. 28, 2015 | Jul. 31, 2014 | Dec. 31, 2016
Telltale |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |
Cost method investments, amount invested | $ 40 |  |
Payments to acquire cost method investments | $ 28 |  |
Shares issued to purchase cost method investment (in shares) | 361,229 |  |
Value of shares issued to purchase cost method investment | $ 12 |  |
Cost method investments, ownership percentage |  |  | 14.00%
Next Games |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |
Payments to acquire cost method investments |  | $ 2 |

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