CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash Flows From Operating Activities
Net loss	$ (71.5)	$ (640.6)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	73.9	74.8
Reduction in carrying amount of operating right-of-use assets	16.6	15.8
Deferred income taxes	(1.3)	(24.4)
Share-based compensation expense	12.0	12.8
Impairment of goodwill	0.0	573.2
Impairment of assets, net	0.0	20.0
Gain on debt extinguishment, net of debt modification costs	0.0	(56.7)
(Gain) loss on investments, net	0.1	(0.1)
Provision for bad debts and accrued customer credits	0.0	4.3
Amortization of debt issuance costs and debt discount and premium	1.5	(2.0)
Third party fees paid in connection with the March 2024 Refinancing Transactions	0.0	(28.4)
Other operating activities	1.2	(0.2)
Changes in operating assets and liabilities:
Accounts receivable	30.2	31.6
Prepaid expenses and other current assets	(13.2)	(14.7)
Accounts payable, accrued expenses, and other current liabilities	(17.3)	(50.3)
Deferred revenue	(9.3)	1.0
Operating lease liabilities	(20.3)	(20.5)
Other non-current assets and liabilities	10.0	14.1
Net cash provided by (used in) operating activities	12.6	(90.3)
Cash Flows From Investing Activities
Purchases of property, equipment and software	(8.3)	(28.1)
Proceeds from sale of headquarters	0.0	16.9
Other investing activities	(0.5)	0.1
Net cash used in investing activities	(8.8)	(11.1)
Cash Flows From Financing Activities
Shares of common stock withheld for employee taxes	0.0	(3.4)
Proceeds from borrowings under long-term debt arrangements	30.0	275.0
Payments on long-term debt	(26.1)	(35.6)
Debt extinguishment costs	0.0	(22.1)
Payments on financing component of interest rate swap	(4.3)	(4.3)
Principal payments of finance lease liabilities	(13.2)	(17.9)
Principal payments of financing obligations	(7.0)	(3.5)
Net cash provided by (used in) financing activities	(20.6)	188.2
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	0.9	(1.0)
Increase (decrease) in cash, cash equivalents, and restricted cash	(15.9)	85.8
Cash, cash equivalents, and restricted cash at beginning of period	147.0	199.7
Cash, cash equivalents, and restricted cash at end of period	131.1	285.5
Supplemental Cash Flow Information
Cash payments for interest, net of amount capitalized	22.2	53.3
Cash payments for income taxes, net of refunds	1.2	1.0
Non-cash Investing and Financing Activities
Acquisition of property, equipment and software by finance leases	23.5	0.0
Increase (decrease) in property, equipment and software accrued in liabilities	(5.1)	18.1
Other non-cash activity	0.0	(0.6)
Non-cash purchases of property, equipment and software	18.4	17.5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash and cash equivalents	128.0	282.6
Restricted cash included in other non-current assets	3.1	2.9
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	$ 131.1	$ 285.5