Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income (loss)	$ (193.2)	$ (2.9)
Reconciliation of net loss to net cash used in operating activities:
Depreciation and amortization	211.5	222.8
Impairment charges	3.2	3.9
Unrealized foreign exchange (gain) loss	(5.4)	1.5
Stock-based compensation	34.3	46.2
Lease amortization	85.0	84.9
Amortization of debt issuance costs	7.4	3.5
Change in deferred taxes	(62.2)	(140.5)
Bad debt expense	26.5	18.2
Other non-cash operating activities	(43.9)	(17.9)
Changes in assets and liabilities:
Trade and other receivables	270.6	121.2
Income taxes payable	(23.0)	41.3
Prepaid expenses and other current assets	(34.3)	(152.4)
Other non-current assets	13.0	37.2
Accounts payable and accrued expenses	(147.0)	(107.0)
Accrued compensation	(299.3)	(148.9)
Other current and non-current liabilities	(65.7)	(111.7)
Net cash used in operating activities	(222.5)	(100.6)
Cash flows from investing activities
Payment for property and equipment	(26.9)	(47.4)
Acquisitions of businesses, net of cash acquired	(102.5)	(268.5)
Return of beneficial interest in a securitization	(85.0)	0.0
Investments in equity securities	(13.9)	(3.9)
Other investing activities, net	(8.5)	0.4
Net cash used in investing activities	(236.8)	(319.4)
Cash flows from financing activities
Net proceeds from issuance of shares	0.0	0.1
Shares repurchased for payment of employee taxes on stock awards	(18.8)	(25.2)
Payment of contingent consideration	(5.5)	(16.4)
Proceeds from senior secured notes	650.0	0.0
Repayment of borrowings	(13.3)	(20.3)
Debt issuance costs	(22.7)	0.0
Payment of finance lease liabilities	(9.9)	(9.2)
Other financing activities, net	1.7	0.1
Net cash provided by (used in) financing activities	581.5	(70.9)
Change in cash, cash equivalents and restricted cash	122.2	(490.9)
Cash, cash equivalents and restricted cash, beginning of the period	872.3	965.4
Effects of exchange rate fluctuations on cash, cash equivalents and restricted cash	0.6	(5.0)
Cash, cash equivalents and restricted cash, end of the period	$ 995.1	$ 469.5