Business Combinations (The Merger - Summary of Information Related to Acquisition) (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 10, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 26, 2019
Business Acquisition [Line Items]
Goodwill		$ 4,112,880	$ 3,795,325
Common Stock, par value		$ 0.001	$ 0.001	$ 0.001
The Merger [Member]
Business Acquisition [Line Items]
Cash	$ 330,665
Accounts receivable, net of allowance for doubtful accounts	718,895
Contract assets	132,704
Prepaid expenses and other current assets	115,265
Investment in business purchase option	146,500
Property and equipment, net	206,751
Goodwill	4,362,252
Other noncurrent assets	169,539
Drafts and accounts payable	(60,637)
Accrued expenses	(559,456)
Deferred revenues, current	(292,528)
Current portion of long-term debt	(28,969)
Other current liabilities	(22,732)
Long-term debt, excluding current portion	(4,713,565)
Deferred income tax liabilities	(579,680)
Tax receivable agreement with related parties	(176,586)
Other long-term liabilities	(102,675)
Total consideration transferred	4,035,743
Accounts receivable, allownace for doubtful accounts	22,059
Fair value of shares issued to SpinCo shareholders (175,995,192 shares at $12.47 per share): Common Stock, $0.001 par value	176
Additional paid-in capital	2,194,484
Fair value of Joint Venture equity interest previously held	1,589,040
Fair value of Joint Venture equity interest previously held through TEUs	216,764
Settlement of dividend receivable	42,778
Repayment of advances to member	(7,499)
Purchase consideration	$ 4,035,743
Fair value of shares issued to SpinCo shareholders , shares	175,995,192
Fair value of shares issued to SpinCo shareholders, share price	$ 12.47
Common Stock, par value	$ 0.001
Customer Relationships [Member] | The Merger [Member]
Business Acquisition [Line Items]
Identified intangible assets	$ 3,056,000
Customer Relationships [Member] | The Merger [Member] | Minimum [Member]
Business Acquisition [Line Items]
Useful life	12 years
Customer Relationships [Member] | The Merger [Member] | Maximum [Member]
Business Acquisition [Line Items]
Useful life	16 years
Tradenames [Member]
Business Acquisition [Line Items]
Useful life	18 years
Tradenames [Member] | The Merger [Member]
Business Acquisition [Line Items]
Identified intangible assets	$ 146,000
Technology-Based Intangible Assets [Member] | The Merger [Member]
Business Acquisition [Line Items]
Identified intangible assets	$ 1,188,000
Technology-Based Intangible Assets [Member] | The Merger [Member] | Minimum [Member]
Business Acquisition [Line Items]
Useful life	6 years
Technology-Based Intangible Assets [Member] | The Merger [Member] | Maximum [Member]
Business Acquisition [Line Items]
Useful life	12 years