Share Based Compensation (Share Based Compensation Plans) (Details)	9 Months Ended
Sep. 30, 2017 shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Director stock awards granted	1,250,000
Employee Stock Purchase Plan shares issued	36,552,000
Restricted stock awards granted	146,850,000
Restricted stock awards forfeited	2,177,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options, Outstanding as of December 31, 2016	1,639,865,000
Stock Option, Granted	970,069,000
Stock Option, Exercised	(386,417,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	3,374,000
Stock Option, Expired	(541,783,000)
Stock Options, Outstanding as of September 30, 2017	1,678,360,000
Shares available for future grants and ESPP purchases as of September 30, 2017	946,572,000
Stock options granted under make-whole provisions	846,353

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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The increase or decrease in number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Number of shares related to Restricted Stock Award forfeited during the period.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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