CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net income (loss)	$ 51.6	$ 90.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	118.2	81.3
Amortization of debt discount and debt issuance costs	2.7	5.5
Noncash interest expense	6.2	0.0
Noncash operating lease expense	25.2	35.5
Holding (gain) loss on equity securities	38.7	(26.2)
Gain on Hurricane Laura	(8.8)	0.0
Income from unconsolidated affiliates	(8.7)	(9.6)
Return on investment from unconsolidated affiliates	8.0	5.5
Deferred income taxes	22.9	8.3
Stock-based compensation	17.0	4.2
Changes in operating assets and liabilities, net of businesses acquired
Accounts receivable	54.2	(41.1)
Prepaid expenses and other current assets	(39.8)	(28.5)
Other assets	6.7	(1.6)
Accounts payable	(7.8)	(10.6)
Accrued expenses	(44.4)	70.9
Income taxes	22.9	20.2
Operating lease liabilities	(23.6)	(31.1)
Other current and long-term liabilities	(16.6)	2.5
Other	0.3	4.4
Net cash provided by operating activities	224.9	180.5
Investing activities
Capital expenditures	(65.6)	(25.7)
Proceeds from sale of property and equipment	3.8	0.0
Hurricane Laura insurance proceeds	24.2	0.0
Other	(2.0)	(1.6)
Net cash used in investing activities	(39.6)	(27.3)
Financing activities
Principal payments on long-term debt	(20.5)	(16.1)
Proceeds from other long-term obligations	0.0	72.5
Payments of other long-term obligations	(0.6)	(0.7)
Principal payments on financing obligations	(15.5)	(8.7)
Principal payments on finance leases	(25.4)	(1.7)
Proceeds from exercise of options	2.3	5.7
Repurchase of common stock	(175.1)	0.0
Proceeds from insurance financing	0.0	23.1
Payments on insurance financing	0.0	(9.2)
Other	(4.4)	(4.8)
Net cash (used in) provided by financing activities	(239.2)	60.1
Effect of currency rate changes on cash, cash equivalents, and restricted cash	(0.9)	0.0
Change in cash, cash equivalents, and restricted cash	(54.8)	213.3
Cash, cash equivalents and restricted cash at the beginning of the year	1,880.1	1,870.4
Cash, cash equivalents and restricted cash at the end of the period	1,825.3	2,083.7
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	1,805.5	2,062.2
Restricted cash included in Other current assets	18.6	20.2
Restricted cash included in Other assets	1.2	1.3
Total cash, cash equivalents and restricted cash	1,825.3	2,083.7
Supplemental disclosure:
Cash paid for interest, net of amounts capitalized	159.9	138.8
Cash payments (refunds) related to income taxes, net	1.0	(8.8)
Non-cash activities:
Commencement of operating leases	38.1	5.7
Commencement of finance leases	1,357.8	0.0
Accrued capital expenditures	$ 28.9	$ 15.6