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Stock Plans (Details 1) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($)
Weighted-average remaining contractual life and aggregate intrinsic value of the Company's stock options outstanding, exerciseable, and vested and expected to vest |
Weighted-average remaining contractual life, Outstanding | 3 years 4 months
Aggregate intrinsic value, Outstanding | $ 279
Weighted-average remaining contractual life, Exercisable | 2 years 9 months
Aggregate intrinsic value, Exercisable | $ 273
Weighted-average remaining contractual life, Vested and Expected to Vest | 3 years 4 months
Aggregate intrinsic value, Vested and Expected to Vest | $ 279

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