Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 42.1	$ 36.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25.1	26.0
Distributions from unconsolidated affiliates	40.6	22.0
Equity in income of unconsolidated affiliates	(32.5)	(24.9)
Stock-based compensation	7.0	5.5
Deferred income taxes	10.2	5.7
Asset impairments	4.9	0.0
Amortization of operating lease assets	1.3	0.2
Other	1.2	1.2
Changes in operating assets and liabilities:
Income taxes	6.4	9.2
Deferred revenue	56.3	21.0
Other assets and liabilities	(27.4)	2.2
Net cash provided by operating activities	135.2	104.2
Cash flows from investing activities:
Capital maintenance expenditures	(10.0)	(4.7)
Capital project expenditures	(45.5)	(7.6)
Other	(7.3)	0.0
Net cash used in investing activities	(62.8)	(12.3)
Cash flows from financing activities:
Proceeds from borrowings under long-term debt obligations	0.0	780.8
Repayments of borrowings under long-term debt obligations	(1.8)	(425.7)
Payment of dividends	(25.7)	(24.8)
Repurchase of common stock	(24.3)	(193.9)
Taxes paid related to net share settlement of stock awards	(13.1)	(12.6)
Debt issuance costs	0.0	(5.8)
Change in bank overdraft	(3.0)	(12.8)
Other	(0.1)	1.6
Net cash (used in) provided by financing activities	(68.0)	106.8
Cash flows from discontinued operations:
Operating activities of discontinued operations	0.0	(124.0)
Net increase in cash, cash equivalents and restricted cash	4.4	74.7
Cash, cash equivalents and restricted cash, beginning of period	355.6	121.0
Cash, cash equivalents and restricted cash, end of period	360.0	195.7
Supplemental disclosures of cash flow information:
Interest	20.7	15.4
Income taxes	0.1	0.1
Schedule of non-cash operating, investing and financing activities:
Property and equipment additions included in accounts payable and accrued expenses	29.9	4.2
Debt issuance costs included in accrued expense and other current liabilities	3.2	0.0
Right-of-use assets obtained in exchange for lease obligations in operating leases	0.9	0.0
Repurchase of common stock included in accrued expense and other current liabilities	$ 0.7	$ 0.0