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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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Cost Method Investments, Ownership Percentage

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Payments to Acquire Cost Method Investments

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- Definition

Purchase of Cost Method Investments, Consideration Transferred, Equity Interests Issued and Issuable

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- Definition

Purchase of Cost Method Investments, Consideration Transferred, Equity Interests Issued and Issuable, Shares

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Original amount of cost-method investments at the acquisition date.

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