Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income (loss)	$ 72.9	$ 181.8	$ (226.2)
(Income) loss from discontinued operations, net of income taxes	20.3	(11.1)	(24.3)
Gain (loss) on sale of discontinued operations, net of provision (benefit) for income taxes of $(1.4), $51.9, and $—	5.7	(131.4)	0.0
Depreciation and amortization	276.4	265.7	258.5
Stock-based compensation expense	22.5	20.7	25.4
Provision (benefit) for deferred income taxes	14.7	13.1	238.5
Net gains on lease portfolio sales	(126.2)
Net gains on lease portfolio sales	(127.5)	(54.1)	(17.3)
Gains on dispositions of property and other assets	(18.0)	(20.0)	(5.3)
Gains on insurance recoveries from property damage	(7.5)	(7.8)	0.0
Pension plan settlement	0.0	0.0	(151.5)
Impairment of long-lived assets	0.0	0.0	396.4
Non-cash impact of restructuring activities	0.0	0.0	5.3
Non-cash interest expense	13.2	13.7	13.7
Loss on extinguishment of debt	1.5	11.7	5.0
Other	(5.3)	(3.1)	0.1
(Increase) decrease in receivables	(92.0)	(64.3)	61.6
(Increase) decrease in income tax receivable	(2.4)	440.4	(441.5)
(Increase) decrease in inventories	(193.4)	(147.7)	106.4
(Increase) decrease in other assets	(11.5)	11.4	146.1
Increase (decrease) in accounts payable	78.4	59.2	(50.4)
Increase (decrease) in accrued liabilities	(37.2)	36.5	(30.4)
Increase (decrease) in other liabilities	(2.9)	0.9	8.9
Net cash provided by operating activities – continuing operations	9.2	615.6	622.0
Net cash provided by (used in) operating activities – discontinued operations	(22.0)	(3.8)	29.7
Net cash provided by (used in) operating activities	(12.8)	611.8	651.7
Proceeds from dispositions of property and other assets	44.0	40.5	32.7
Proceeds From Sale Of Property Subject To Or Available For Operating Lease	750.7	454.3
Proceeds from Sales of Railcars Owned More Than One Year at the Time of Sale			138.7
Capital expenditures – leasing, net of sold lease fleet railcars owned one year or less with a net cost of $54.0 for the year ended December 31, 2020	(928.8)	(547.2)	(602.2)
Capital expenditures – manufacturing and other	(38.0)	(23.6)	(95.9)
Acquisitions, net of cash acquired	(80.4)	(16.6)	0.0
Proceeds from insurance recoveries	10.0	9.5	0.0
Equity investments		0.1
Equity investments	(15.5)		0.0
Net cash used in investing activities – continuing operations	(258.0)	(83.0)	(526.7)
Net cash provided by (used in) investing activities	(260.7)	276.3	(532.9)
Payments to retire debt	(1,578.5)	(2,315.8)	(1,442.9)
Proceeds from issuance of debt	2,000.6	2,444.1	1,561.4
Shares repurchased	(51.8)	(833.4)	(191.3)
Dividends paid to common shareholders	(76.9)	(88.5)	(91.7)
Purchase of shares to satisfy employee tax on vested stock	(5.7)	(9.3)	(9.5)
Distributions to noncontrolling interest	22.3	11.2	(6.1)
Proceeds from (Payments for) Other Financing Activities	0.0	0.0	(0.1)
Net cash provided by (used in) financing activities	265.4	(814.1)	(168.0)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(8.1)	74.0	(49.2)
Cash, cash equivalents, and restricted cash at beginning of period	302.4	228.4	277.6
Cash, cash equivalents, and restricted cash at end of period	294.3	302.4	228.4
Interest paid	190.5	178.4	205.5
Income tax (payments) refunds	(19.3)	435.7	62.5
Sale of Highway Products
(Income) loss from discontinued operations, net of income taxes	20.3	(11.9)	(24.4)
Gain (loss) on sale of discontinued operations, net of provision (benefit) for income taxes of $(1.4), $51.9, and $—	4.4
Proceeds from (Payments to) related to the Sale of Discontinued Operations, Net of Cash Divested | Sale of Highway Products
Proceeds (payments) related to sale of discontinued operations	(2.7)	364.7	0.0
Net cash used in investing activities – discontinued operations	(2.7)
Other Investing Activities
Net cash used in investing activities – discontinued operations	$ 0.0	$ (5.4)	$ (6.2)