Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On January 14, 2016, we completed the acquisition of iSIGHT Security, Inc. (d/b/a iSIGHT Partners, Inc.), one of the world’s leading providers of cyber threat intelligence for global enterprises. The acquisition extends our intelligence network to create an advanced and comprehensive private cyber threat intelligence operation, providing customers with higher fidelity alerts, context to prioritize threats and the strategic insights to proactively prepare for threats that might target their industry or region. As consideration for the acquisition, we paid approximately $200 million in cash upon closing, subject to adjustment per the terms of the agreement, with an additional $75 million payable in cash and equity contingent upon the achievement of a threat intelligence bookings target on or before the end of the second quarter of 2018. We incurred approximately $7 million in acquisition-related costs, which will be recognized in general and administrative expenses in 2016. On February 1, 2016, we completed the acquisition of Invotas International Corporation, a provider of security automation and orchestration technology. This acquisition enables us to deliver a premier security orchestration capability as part of our global threat management platform to unify cyber attack detection results, threat intelligence and incident response elements of an organization’s security program into a single console, giving enterprises the ability to respond more quickly to attacks through automation. As consideration for the acquisition, we paid approximately $30 million in cash and equity, subject to adjustment per the terms of the agreement. We are currently in the process of completing the preliminary purchase price allocations for these acquisitions, which will be included in our condensed consolidated financial statements for the first quarter of 2016.

Subsequent Events

On January 14, 2016, we completed the acquisition of iSIGHT Security, Inc. (d/b/a iSIGHT Partners, Inc.), one of the world’s leading providers of cyber threat intelligence for global enterprises. The acquisition extends our intelligence network to create an advanced and comprehensive private cyber threat intelligence operation, providing customers with higher fidelity alerts, context to prioritize threats and the strategic insights to proactively prepare for threats that might target their industry or region. As consideration for the acquisition, we paid approximately $200 million in cash upon closing, subject to adjustment per the terms of the agreement, with an additional $75 million payable in cash and equity contingent upon the achievement of a threat intelligence bookings target on or before the end of the second quarter of 2018. We incurred approximately $7 million in acquisition-related costs, which will be recognized in general and administrative expenses in 2016.

On February 1, 2016, we completed the acquisition of Invotas International Corporation, a provider of security automation and orchestration technology. This acquisition enables us to deliver a premier security orchestration capability as part of our global threat management platform to unify cyber attack detection results, threat intelligence and incident response elements of an organization’s security program into a single console, giving enterprises the ability to respond more quickly to attacks through automation. As consideration for the acquisition, we paid approximately $30 million in cash and equity, subject to adjustment per the terms of the agreement.

We are currently in the process of completing the preliminary purchase price allocations for these acquisitions, which will be included in our condensed consolidated financial statements for the first quarter of 2016.