Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 144.4	$ (142.3)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	52.0	44.1
Distributions from unconsolidated affiliates	47.5	4.8
Equity in (income) loss of unconsolidated affiliates	(61.3)	14.4
Stock-based compensation	12.6	10.4
Deferred income taxes	7.4	(24.8)
Asset impairments	11.2	17.5
Amortization of operating lease assets	2.7	2.5
Other	3.1	1.8
Changes in operating assets and liabilities:
Income taxes	39.5	(22.4)
Deferred revenue	(12.6)	43.5
Current liabilities of discontinued operations	(124.0)	124.0
Other assets and liabilities	87.8	3.4
Net cash provided by operating activities	210.3	76.9
Cash flows from investing activities:
Capital maintenance expenditures	(13.7)	(13.2)
Capital project expenditures	(15.9)	(118.1)
Other	(0.9)	(0.5)
Net cash used in investing activities	(30.5)	(131.8)
Cash flows from financing activities:
Proceeds from borrowings under long-term debt obligations	780.8	726.1
Repayments of borrowings under long-term debt obligations	(427.4)	(33.4)
Payment of dividends	(24.8)	(23.4)
Repurchase of common stock	(193.9)	(28.4)
Cash settlement of stock awards	0.0	(12.7)
Taxes paid related to net share settlement of stock awards	(12.6)	(15.1)
Debt issuance costs	(6.8)	(1.7)
Change in bank overdraft	(6.1)	0.0
Other	1.4	0.0
Net cash provided by financing activities	110.6	611.4
Net increase in cash, cash equivalents and restricted cash	290.4	556.5
Cash, cash equivalents and restricted cash, beginning of period	121.0	142.5
Cash, cash equivalents and restricted cash, end of period	411.4	699.0
Supplemental disclosures of cash flow information:
Cash paid for during the period for interest	35.9	39.7
Cash paid for during the period for income taxes	10.4	0.7
Schedule of non-cash operating, investing and financing activities:
Property and equipment additions included in accounts payable and accrued expenses	5.0	28.1
Right-of-use assets obtained in exchange for lease obligations in operating leases	$ 9.2	$ 2.6