Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities
Net income (loss)	$ 1.9	$ (28.8)
Reconciliation of net income (loss) to net cash used in operating activities:
Depreciation and amortization	26.7	32.5
Impairment charges	6.5	1.1
Unrealized foreign exchange loss (gain)	0.2	(2.4)
Stock-based compensation	16.0	6.4
Lease amortization	21.7	22.0
Amortization of debt issuance costs	2.0	1.5
Earnings from equity method investments, net of distributions received	(11.1)	(7.7)
Change in deferred taxes	34.7	8.1
Provision for loss on receivables and other assets	2.8	2.4
Unrealized loss on equity securities, net	0.7	1.0
Other operating activities, net	(8.4)	(5.2)
Changes in assets and liabilities:
Trade and other receivables	90.0	138.0
Income taxes payable	(47.5)	(20.3)
Short-term contract assets and Prepaid expenses and other current assets	(74.4)	(32.0)
Other non-current assets	(39.1)	(45.8)
Accounts payable and accrued expenses	(28.0)	(55.0)
Accrued compensation	(148.9)	(137.0)
Other current and non-current liabilities	(7.8)	(3.9)
Net cash used in operating activities	(162.0)	(125.1)
Cash flows from investing activities
Payment for property and equipment	(4.6)	(10.5)
Acquisitions of businesses, net of cash acquired	(4.9)	0.0
Investments in equity securities	(7.1)	(0.4)
Return of beneficial interest in a securitization	(100.0)	(100.0)
Collection on beneficial interest in a securitization	130.0	100.0
Other investing activities, net	7.2	0.1
Net cash provided by (used in) investing activities	20.6	(10.8)
Cash flows from financing activities
Shares repurchased for payment of employee taxes on stock awards	(10.2)	(9.1)
Payment of deferred and contingent consideration	(0.1)	(1.9)
Repayment of borrowings	(25.0)	(55.0)
Payment of finance lease liabilities	(6.4)	(6.9)
Other financing activities, net	0.4	0.0
Net cash used in financing activities	(41.3)	(72.9)
Change in cash, cash equivalents and restricted cash	(182.7)	(208.8)
Cash, cash equivalents and restricted cash, beginning of the period	814.6	801.2
Effects of exchange rate fluctuations on cash, cash equivalents and restricted cash	8.3	(6.6)
Cash, cash equivalents and restricted cash, end of the period	$ 640.2	$ 585.8