Subsequent Events	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In October 2020, the Company announced a new Virtual First work model pursuant to which remote work will become the primary experience for all of its employees. As a result, the Company intends for its workforce to become more distributed over time, and will reduce its existing real-estate footprint while maintaining a scaled down presence in its current locations. Accordingly, the Company plans to sublease space in certain office locations. As a result of the Company's announcement to move towards a Virtual First work model, it is reassessing its asset groupings and evaluating the recoverability of the individual asset groups. Based on its preliminary assessment, the Company anticipates recording an impairment charge related to the right of use and other lease related assets in the range of $400 to $450 million. A substantial majority of the charge is expected to be incurred in the fourth quarter of 2020 but a portion of this amount may be incurred through the first half of 2021.