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	$ 77.2	$ 80.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	59.2	46.9
Distributions from unconsolidated affiliates	31.4	45.0
Equity in income of unconsolidated affiliates	(33.3)	(37.8)
Stock-based compensation	3.6	7.2
Deferred income taxes	0.0	4.9
Amortization of operating lease assets	1.6	1.4
Other	2.3	1.7
Changes in operating assets and liabilities:
Income taxes	19.0	17.0
Deferred revenue	93.9	80.1
Other assets and liabilities	(8.4)	7.9
Net cash provided by operating activities	246.5	254.7
Cash flows from investing activities:
Capital maintenance expenditures	(12.6)	(12.4)
Capital project expenditures	(67.5)	(142.6)
Other	0.0	1.6
Net cash used in investing activities	(80.1)	(153.4)
Cash flows from financing activities:
Proceeds from borrowings under long-term debt obligations	219.7	355.5
Repayments of borrowings under long-term debt obligations	(251.4)	(266.7)
Payment of dividends	(30.1)	(28.6)
Repurchase of common stock	(86.4)	(141.7)
Taxes paid related to net share settlement of stock awards	(3.9)	(10.4)
Debt issuance costs	(0.3)	0.0
Change in bank overdraft	4.6	(8.6)
Other	(0.1)	(0.6)
Net cash used in financing activities	(147.9)	(101.1)
Net increase in cash, cash equivalents and restricted cash	18.5	0.2
Cash, cash equivalents and restricted cash, beginning of period	252.7	221.8
Cash, cash equivalents and restricted cash, end of period	271.2	222.0
Supplemental disclosures of cash flow information:
Cash paid for interest	44.6	50.8
Cash paid for income taxes	1.0	0.2
Cash received from income tax refunds	1.4	0.1
Schedule of non-cash operating, investing and financing activities:
Property and equipment additions included in accounts payable and accrued expenses	48.2	83.9
Right-of-use assets obtained in exchange for lease obligations in operating leases	5.9	0.1
Right-of-use assets obtained in exchange for lease obligations in finance leases	0.0	3.6
Repurchase of common stock included in accrued expense and other current liabilities	$ 6.0	$ 4.0