Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)	$ (83.8)	$ (60.1)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	24.5	23.7
Amortization of debt discounts and issuance costs	2.5	2.3
Amortization of deferred commissions costs	11.1	2.1
Loss on early extinguishment of debt	14.9	9.4
Deferred consideration valuation adjustments	1.4	0.7
Equity-based compensation expense	75.8	11.6
Deferred income taxes	3.2	(6.7)
Provision for bad debt expense	0.9	0.4
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	0.7	(13.2)
Prepaid expenses and other current assets	(0.4)	(1.0)
Deferred costs and other assets	(14.5)	(9.0)
Income tax receivable	(0.2)	0.2
Related party receivable	(0.7)	0.5
Accounts payable	1.9	2.8
Accrued expenses and other liabilities	3.4	1.9
Unearned revenue	12.9	43.3
Net cash provided by (used in) operating activities	53.6	8.9
Cash flows from investing activities:
Purchases of property and equipment and other assets	(8.2)	(6.2)
Cash paid for acquisitions, net of cash acquired	0.0	(714.9)
Net cash provided by (used in) investing activities	(8.2)	(721.1)
Cash flows from financing activities:
Payments of deferred consideration	(24.0)	(0.3)
Proceeds from debt	35.0	1,220.8
Repayment of debt	(510.9)	(645.4)
Payments of debt issuance costs	(1.0)	(16.7)
Repurchase outstanding equity / member units	(332.4)	(11.9)
Proceeds from equity offering, net of underwriting discounts	1,019.6	200.2
Payments of IPO issuance costs	(7.2)	0.0
Tax distributions	(6.8)	(13.4)
Net cash provided by (used in) financing activities	172.3	733.3
Net increase (decrease) in cash, cash equivalents, and restricted cash	217.7	21.1
Cash, cash equivalents, and restricted cash at beginning of period	42.5	9.0
Cash, cash equivalents, and restricted cast at end of period	260.2	30.1
Supplemental disclosures of cash flow information
Interest paid in cash	47.1	47.7
Supplemental disclosures of non-cash investing and financing activities:
Deferred variable consideration from acquisition of a business	0.0	33.2
Issuance cost reimbursements included in accounts receivable	$ 4.2	$ 0.0