Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating Activities
Net Income (Loss) Attributable to Parent	$ 118,700,000	$ 140,700,000
Depreciation, Depletion and Amortization	203,800,000	189,700,000
Adjustments to reconcile income to net cash provided by operating activities:
Net gains on sales of assets	(61,600,000)	(89,000,000.0)
Asset Impairment Charges	0	1,200,000
Deferred income taxes	23,100,000	27,800,000
Share of affiliates’ earnings, net of dividends	(32,300,000)	(34,700,000)
Changes in working capital items	(15,800,000)	22,700,000
Net cash provided by operating activities	235,900,000	258,400,000
Investing Activities
Portfolio investments and capital additions	(820,600,000)	(873,600,000)
Portfolio proceeds	105,300,000	166,500,000
Proceeds from sales of other assets	15,900,000	10,900,000
Other	400,000	1,600,000
Net cash used in investing activities	(699,000,000.0)	(544,600,000)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	1,285,000,000	585,400,000
Repayments of debt (original maturities longer than 90 days)	(413,500,000)	(250,000,000.0)
Net decrease in debt with original maturities of 90 days or less	0	(6,800,000)
Stock repurchases	(8,900,000)	0
Dividends	(43,000,000.0)	(40,800,000)
Other	19,700,000	11,100,000
Net cash provided by financing activities	839,300,000	298,900,000
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(3,200,000)	1,000,000.0
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance	450,800,000	304,000,000.0
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance	823,800,000	317,700,000
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	373,000,000.0	13,700,000
Payments to Acquire Short-Term Investments	$ 0	$ 150,000,000.0