Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 294.8	$ 290.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	117.0	96.1
Distributions from unconsolidated affiliates	62.8	81.7
Equity in income of unconsolidated affiliates	(70.4)	(75.5)
Stock-based compensation	10.8	16.1
Deferred income taxes	3.5	19.7
Asset impairments	2.4	0.0
Amortization of operating lease assets	3.2	2.7
Other	4.0	4.8
Changes in operating assets and liabilities:
Income taxes	81.2	52.9
Deferred revenue	(37.0)	(45.7)
Other assets and liabilities	13.8	28.3
Net cash provided by operating activities	486.1	471.7
Cash flows from investing activities:
Capital maintenance expenditures	(31.5)	(34.8)
Capital project expenditures	(133.3)	(257.2)
Other	(1.3)	1.9
Net cash used in investing activities	(166.1)	(290.1)
Cash flows from financing activities:
Proceeds from borrowings under long-term debt obligations	641.5	617.4
Repayments of borrowings under long-term debt obligations	(546.7)	(598.3)
Payment of dividends	(30.2)	(28.8)
Repurchase of common stock	(340.9)	(154.7)
Taxes paid related to net share settlement of stock awards	(4.0)	(10.5)
Change in bank overdraft	(5.0)	2.6
Other	(1.8)	(1.2)
Net cash used in financing activities	(287.1)	(173.5)
Cash flows from discontinued operations:
Operating activities of discontinued operations	0.0	1.0
Net increase in cash, cash equivalents and restricted cash	32.9	9.1
Cash, cash equivalents and restricted cash, beginning of period	252.7	221.8
Cash, cash equivalents and restricted cash, end of period	285.6	230.9
Supplemental disclosures of cash flow information:
Cash paid for interest	145.0	155.4
Cash paid for income taxes	10.0	33.1
Cash received from income tax refunds	1.4	1.2
Schedule of non-cash operating, investing and financing activities:
Property and equipment additions included in accounts payable and accrued expenses	28.0	78.8
Right-of-use assets obtained in exchange for lease obligations in operating leases	9.2	3.2
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	$ 1.9	$ 4.0