Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities
Net income	$ 82,100,000	$ 133,500,000
Income from discontinued operations, net of taxes	0	1,100,000
Net income from continuing operations	82,100,000	132,400,000
Adjustments to reconcile income to net cash provided by operating activities:
Depreciation expense	281,900,000	254,600,000
Net gains on sales of assets	(76,600,000)	(40,500,000)
Deferred income taxes	19,700,000	29,800,000
Share of affiliates’ earnings, net of dividends	21,500,000	(60,100,000)
Changes in working capital items	11,400,000	(14,100,000)
Net cash provided by operating activities of continuing operations	340,000,000.0	302,100,000
Investing Activities
Additions to operating assets and facilities	(891,400,000)	(641,400,000)
Acquisition of new businesses	(1,400,000)
Investments in affiliates	(400,000)
Portfolio investments and capital additions	(893,200,000)	(641,400,000)
Portfolio proceeds	159,000,000.0	120,200,000
Proceeds from sales of other assets	43,700,000	17,500,000
Other	600,000	1,300,000
Net cash used in investing activities of continuing operations	(689,900,000)	(502,400,000)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	1,319,100,000	1,465,800,000
Repayments of debt (original maturities longer than 90 days)	(584,000,000.0)	(1,100,000,000)
Net decrease in debt with original maturities of 90 days or less	(1,900,000)	(3,100,000)
Stock repurchases	(400,000)	0
Dividends	(56,200,000)	(53,700,000)
Purchases of assets previously leased	(77,200,000)	(40,000,000.0)
Other	24,400,000	(13,100,000)
Net cash provided by financing activities of continuing operations	623,800,000	255,900,000
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(1,400,000)	(1,000,000.0)
Net cash used in operating activities from discontinued operations	0	(8,500,000)
Net cash provided by investing activities from discontinued operations	1,100,000	240,900,000
Net cash provided by financing activities from discontinued operations	0	21,800,000
Cash provided by discontinued operations, net	1,100,000	254,200,000
Net increase in Cash, Cash Equivalents, and Restricted Cash during the period	273,600,000	308,800,000
Cash, Cash Equivalents, and Restricted Cash at beginning of period	292,600,000	151,000,000.0
Cash, Cash Equivalents, and Restricted Cash at end of period	$ 566,200,000	$ 459,800,000