Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities
Net income	$ 78,400,000	$ 42,000,000.0
Adjustments to reconcile income to net cash provided by operating activities:
Depreciation expense	186,100,000	187,300,000
Net gains on sales of assets	(77,300,000)	(55,500,000)
Asset impairments	31,500,000	0
Deferred income taxes	15,600,000	10,700,000
Share of affiliates’ earnings (losses), net of dividends	(7,300,000)	24,500,000
Changes in working capital items	(10,500,000)	(10,400,000)
Net cash provided by operating activities	216,500,000	198,600,000
Investing Activities
Portfolio investments and capital additions	(684,500,000)	(663,400,000)
Portfolio proceeds	160,800,000	124,100,000
Proceeds from sales of other assets	19,400,000	29,100,000
Other	28,200,000	(100,000)
Net cash used in investing activities	(476,100,000)	(510,300,000)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	395,100,000	1,072,600,000
Repayments of debt (original maturities longer than 90 days)	(250,000,000.0)	(584,000,000.0)
Net increase (decrease) in debt with original maturities of 90 days or less	3,400,000	(5,200,000)
Stock repurchases	(39,200,000)	0
Dividends	(39,200,000)	(37,900,000)
Purchases of assets previously leased	(1,500,000)	(33,300,000)
Other	30,400,000	24,100,000
Net cash provided by financing activities	99,000,000.0	436,300,000
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(3,400,000)	(200,000)
Cash provided by discontinued operations, net	0	1,100,000
Cash, Cash Equivalents, and Restricted Cash at beginning of the period	344,500,000	292,600,000
Cash, Cash Equivalents, and Restricted Cash at end of the period	180,500,000	418,100,000
Net (decrease) increase in Cash, Cash Equivalents, and Restricted Cash during the period	(164,000,000.0)	125,500,000
Non-cash financing lease transactions	$ 0	$ 43,600,000