Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income	$ 298.7	$ 381.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	79.7	51.2
Distributions from unconsolidated affiliates	91.7	77.9
Equity in income of unconsolidated affiliates	(77.1)	(73.0)
Stock-based compensation	16.7	14.4
Deferred income taxes	32.4	20.4
Asset impairments	24.5	4.9
Amortization of operating lease assets	3.5	2.7
Gain on sale of assets	(114.0)	(274.6)
Other	3.6	2.9
Changes in operating assets and liabilities:
Income taxes	41.6	154.0
Deferred revenue	(15.5)	(37.9)
Other assets and liabilities	16.8	56.5
Net cash provided by operating activities	402.6	380.8
Cash flows from investing activities:
Capital maintenance expenditures	(30.2)	(23.0)
Capital project expenditures	(282.2)	(144.1)
Proceeds from sale of assets	195.7	279.0
Other	(2.3)	(7.3)
Net cash (used in) provided by investing activities	(119.0)	104.6
Cash flows from financing activities:
Proceeds from borrowings under long-term debt obligations	1,223.3	1,200.0
Repayments of borrowings under long-term debt obligations	(1,201.4)	(3.5)
Payment of dividends	(26.7)	(25.7)
Repurchase of common stock	(0.5)	(84.5)
Taxes paid related to net share settlement of stock awards	(13.2)	(13.2)
Debt issuance costs	(12.2)	(11.4)
Change in bank overdraft	(16.2)	(3.0)
Other	(0.8)	(0.2)
Net cash (used in) provided by financing activities	(47.7)	1,058.5
Cash flows from discontinued operations:
Operating activities of discontinued operations	0.5	0.0
Net increase in cash, cash equivalents and restricted cash	236.4	1,543.9
Cash, cash equivalents and restricted cash, beginning of period	204.7	355.6
Cash, cash equivalents and restricted cash, end of period	441.1	1,899.5
Supplemental disclosures of cash flow information:
Cash paid for interest	135.4	42.4
Cash paid for income taxes	35.6	15.9
Cash received from income tax refunds	0.8	33.1
Schedule of non-cash operating, investing and financing activities:
Property and equipment additions included in accounts payable and accrued expenses	51.4	32.5
Debt issuance costs included in accrued expense and other current liabilities	1.4	1.8
Right-of-use assets obtained in exchange for lease obligations in operating leases	1.1	0.9
Right-of-use assets obtained in exchange for lease obligations in finance leases	33.2	0.0
Repurchase of common stock included in accrued expense and other current liabilities	$ 0.0	$ 2.0