Segments and Related Information - Foreign Operations and Other, Narrative (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segments and Related Information [Line Items]
Revenue			$ 2,404,332	$ 1,698,279	$ 6,142,414	$ 4,684,180
Property and equipment, net	$ 1,063,358	$ 982,328	$ 1,063,358		$ 1,063,358
Govermment | Revenue Benchmark | Customer Concentration Risk
Segments and Related Information [Line Items]
Concentration risk, percentage of total			5.00%	2.00%	5.00%	2.00%
United States
Segments and Related Information [Line Items]
Revenue			$ 2,400,000	$ 1,700,000	$ 6,000,000	$ 4,600,000
Property and equipment, net	1,000,000	959,500	1,000,000		1,000,000
Intangible assets and goodwill, net	1,800,000	1,400,000	1,800,000		1,800,000
Foreign Operations
Segments and Related Information [Line Items]
Revenue			40,800	$ 18,200	120,700	$ 77,800
Property and equipment, net	21,700	22,800	21,700		21,700
Intangible assets and goodwill, net	$ 45,400	$ 50,500	$ 45,400		$ 45,400
Foreign Operations | Accounts Receivable, Net, Less Deferred Revenue | Geographic Concentration Risk
Segments and Related Information [Line Items]
Concentration risk, percentage of total	4.00%	5.00%