Acquisitions and Dispositions - Defenders Acquisition Narrative (Details) - USD ($) $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Jan. 06, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired		$ 179,569	$ 53,893
Issuance of shares for acquisition of business		113,841	0
Goodwill		5,217,400			$ 4,959,658
Merger, restructuring, integration, and other		108,794	$ 6,279
Defenders
Business Acquisition [Line Items]
Consideration transferred	$ 289,000
Acquisition of businesses, net of cash acquired	$ 172,000
Shares issued for acquisition (in shares)	16
Issuance of shares for acquisition of business	$ 114,000
Goodwill				$ 250,632
Merger, restructuring, integration, and other		$ 81,000
Customer Relationships | Defenders
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	14 years