Trinity Industries (TRN) 10-Q 26 Oct 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 20, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	1-6903
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-0225040
Entity Address, Address Line One	2525 N. Stemmons Freeway
Entity Address, City or Town	Dallas,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75207-2401
City Area Code	214
Local Phone Number	631-4420
Title of 12(b) Security	Common Stock
Entity Trading Symbol	TRN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		114,161,556
Entity Registrant Name	TRINITY INDUSTRIES INC
Entity Central Index Key	0000099780
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period	Q3
Current Fiscal Year End Date	--12-31

Consolidated Statements of Oper

Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues [Abstract]
Revenues	$ 459.4	$ 813.6	$ 1,583.8	$ 2,154.4
Cost of revenues:
Cost of revenues:	334.5	649.1	1,213.1	1,691
Selling, engineering, and administrative expenses:
Selling, engineering, and administrative expenses:	51.2	62.1	172.3	191.5
Gains (losses) on dispositions of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	2.9	18.1	17.3	44.7
Other	1	(0.2)	2.8	2.5
Gain (Loss) on Disposition of Property Plant Equipment	3.9	17.9	20.1	47.2
Impairment of long-lived assets	0	0	369.4	0
Restructuring activities, net	4.7	0	10.5	0
Operating profit on sales of leased railcars:	72.9	120.3	(161.4)	319.1
Other (income) expense:
Interest income	(0.6)	(1.8)	(3)	(4.7)
Interest expense	52.3	55.8	166.6	165.5
Other, net	2	0	0.5	0.2
Other (income) expense	53.7	54	164.1	161
Income (loss) from continuing operations before income taxes	19.2	66.3	(325.5)	158.1
Current Income Tax Expense (Benefit)	(18.7)	2.5	(471.2)	2.7
Provision for deferred income taxes	12	15.7	245.1	38.5
Provision (benefit) for income taxes	(6.7)	18.2	(226.1)	41.2
Income (loss) from continuing operations	25.9	48.1	(99.4)	116.9
Loss from discontinued operations, net of benefit for income taxes of $—, $0.1, $0.1, and $0.6	0	(0.4)	(0.2)	(2.3)
Discontinued Operation, Tax Effect of Discontinued Operation	0	(0.1)	(0.1)	(0.6)
Net income (loss)	25.9	47.7	(99.6)	114.6
Net income (loss) attributable to noncontrolling interest	0.8	(1.3)	(79.5)	(1.4)
Net income (loss) attributable to Trinity Industries, Inc.	$ 25.1	$ 49	$ (20.1)	$ 116
Basic earnings per common share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.21	$ 0.39	$ (0.17)	$ 0.91
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	(0.02)
Basic net income (loss) attributable to Trinity Industries, Inc.	0.21	0.39	(0.17)	0.89
Income (Loss) from Continuing Operations, Per Diluted Share	0.21	0.39	(0.17)	0.90
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0	0	(0.02)
Diluted net income (loss) attributable to Trinity Industries, Inc.	$ 0.21	$ 0.39	$ (0.17)	$ 0.88
Weighted average number of shares outstanding:
Weighted Average Number of Shares Outstanding, Basic	116.4	124.7	117.2	127.6
Weighted Average Number of Shares Outstanding, Diluted	117	126	117.2	129.2
Manufacturing
Revenues [Abstract]
Revenues	$ 275.7	$ 487.4	$ 971.4	$ 1,351.1
Cost of revenues:
Cost of revenues:	248.1	430.7	885.2	1,181.9
Selling, engineering, and administrative expenses:
Selling, engineering, and administrative expenses:	18.5	27.5	60	77.2
Leasing
Revenues [Abstract]
Revenues	183.7	326.2	612.4	803.3
Cost of revenues:
Cost of revenues:	86.4	218.4	327.9	509.1
Selling, engineering, and administrative expenses:
Selling, engineering, and administrative expenses:	11.7	10.7	39	36.2
Other
Selling, engineering, and administrative expenses:
Selling, engineering, and administrative expenses:	$ 21	$ 23.9	$ 73.3	$ 78.1

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 25.9	$ 47.7	$ (99.6)	$ 114.6
Derivative financial instruments:
Unrealized gains (losses) arising during the period, net of tax benefit (expense) of $(0.6), $1.4, $7.6, and $5.5	2	(4.6)	(25.3)	(18.1)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(0.6)	1.4	7.6	5.5
Reclassification adjustments for losses included in net income, net of tax benefit of $1.3, $0.3, $3.0, and $0.7	4.7	1	10.6	2.9
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	1.3	0.3	3	0.7
Defined benefit plans:
Amortization of prior service cost, net of tax benefit of $0.1, $—, $0.3, and $—	0.2	0	0.6	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax	0.1	0	0.3	0
Amortization of net actuarial losses, net of tax benefit of $0.3, $0.3, $0.9, and $0.9	1.2	0.9	3.6	2.5
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	0.3	0.3	0.9	0.9
Other Comprehensive Income (Loss), Net of Tax, Total	8.1	(2.7)	(10.5)	(12.7)
Comprehensive income (loss)	34	45	(110.1)	101.9
Less: comprehensive income (loss) attributable to noncontrolling interest	1.1	(0.9)	(78.6)	(0.4)
Comprehensive income (loss) attributable to Trinity Industries, Inc.	$ 32.9	$ 45.9	$ (31.5)	$ 102.3

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Millions, $ in Millions	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 120.8	$ 166.2
Receivables, net of allowance	219.9	260.1
Income tax receivable	485	14.7
Inventories:
Raw materials and supplies	196	263.4
Work in process	79.2	108.8
Finished goods	97.9	61.2
Inventory, Net	373.1	433.4
Restricted cash, including partially-owned subsidiaries of $28.1 and $33.0	101.1	111.4
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	9,153.9	9,272.5
Less accumulated depreciation, including partially-owned subsidiaries of $513.9 and $527.7	2,216	2,161.9
Property, Plant and Equipment, Net	6,937.9	7,110.6
Goodwill	208.8	208.8
Other assets	276.6	396.2
Total assets	8,723.2	8,701.4
Liabilities and Equity [Abstract]
Accounts payable	178.9	203.9
Accrued liabilities	333.8	342.1
Debt:
Recourse	523.1	522.8
Total debt	4,935.1	4,881.9
Deferred income taxes	1,040.6	798.3
Other liabilities	141.2	96.3
Total liabilities	$ 6,629.6	$ 6,322.5
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Shares Authorized	1.5	1.5
Preferred Stock, Shares Subscribed but Unissued	1.5	1.5
Preferred stock – 1.5 shares authorized and unissued	$ 0	$ 0
Common Stock, Shares Authorized	400	400
Common stock – 400.0 shares authorized	$ 1.2	$ 1.2
Capital in excess of par value	5.3	0
Retained earnings	2,066.8	2,182.9
Accumulated other comprehensive loss	(164.5)	(153.1)
Treasury stock	(91.5)	(0.9)
Total Equity	1,817.3	2,030.1
Noncontrolling interest	276.3	348.8
Total stockholders' equity	2,093.6	2,378.9
Total liabilities and stockholders' equity	8,723.2	8,701.4
Partially-owned subsidiaries
Inventories:
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	1,929.5	2,065.3
Less accumulated depreciation, including partially-owned subsidiaries of $513.9 and $527.7	513.9	527.7
Debt:
Non-Recourse Debt	1,239.3	1,278.4
Wholly-owned subsidiaries
Debt:
Non-Recourse Debt	$ 3,172.7	$ 3,080.7

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income (loss)	$ (99.6)	$ 114.6
Loss from discontinued operations, net of income taxes	(0.2)	(2.3)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	199.5	210.5
Stock-based compensation expense	19.7	21.4
Provision for deferred income taxes	245.1	38.5
Net gains on railcar lease fleet sales owned more than one year at the time of sale	(17.3)	(44.7)
Gains on dispositions of property and other assets	(6.3)	(2.5)
Impairment of long-lived assets	369.4	0
Non-cash impact of restructuring activities	5.9	0
Non-cash interest expense	9.5	10.4
Loss on early extinguishment of debt	5	0
Other	2.1	(2)
Changes in operating assets and liabilities:
(Increase) decrease in receivables	40.1	(28.1)
(Increase) decrease in income tax receivable	(470.3)	19.3
(Increase) decrease in inventories	60.3	(108.2)
(Increase) decrease in other assets	142	(68.6)
Increase (decrease) in accounts payable	(28.9)	38.7
Increase (decrease) in accrued liabilities	(18.8)	(28.8)
Increase (decrease) in other liabilities	(0.8)	(6.5)
Net cash provided by operating activities – continuing operations	456.8	166.3
Net cash used in operating activities – discontinued operations	(0.2)	(2.3)
Net cash provided by operating activities	456.6	164
Investing activities:
Proceeds from dispositions of property and other assets	19.8	19.5
Proceeds from railcar lease fleet sales owned more than one year at the time of sale	138.7	175
Capital expenditures – leasing, net of sold lease fleet railcars owned one year or less with a net cost of $54.0 and $210.3	448.8	854.3
Payments to Acquire Leasing Assets Net of Sold Railcars Owned One Year or Less Net Cost	54	210.3
Capital expenditures – manufacturing and other	(70.7)	(63.3)
Other	0	(0.2)
Net cash used in investing activities	(361)	(723.3)
Financing activities:
Payments to retire debt	(795.5)	(1,360.8)
Proceeds from issuance of debt	835.8	2,010.2
Shares repurchased	(120.4)	(154.9)
Dividends paid to common shareholders	(67.8)	(60.8)
Purchase of shares to satisfy employee tax on vested stock	(9.3)	(8)
Contributions from (distributions to) noncontrolling interest	6.1	2.1
Other	(0.2)	0
Net cash provided by (used in) financing activities	(151.3)	423.6
Net decrease in cash, cash equivalents, and restricted cash	(55.7)	(135.7)
Cash, cash equivalents, and restricted cash at beginning of period	277.6	350.8
Cash, cash equivalents, and restricted cash at end of period	$ 221.9	$ 215.1

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity (unaudited) - USD ($) $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Capital in Excess of Par Value	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Treasury Stock	Trinity Stockholders’ Equity	Trinity Stockholders’ EquityCumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest
Common Stock, Shares, Issued				(133,300,000)					(100,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2018		$ 2,562		$ 1.3	$ 1.2	$ 2,326.1		$ (116.8)	$ (1)	$ 2,210.8		$ 351.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		30.1				30.6				30.6		(0.5)
Other comprehensive (loss) income		(3.8)						(4.1)		(4.1)		0.3
Cash dividends declared on common stock (1)	[1]	(22.3)				(22.3)				(22.3)
Stock-based compensation expense		$ 5.5			5.5					5.5
Settlement of share-based awards, net									0
Shares repurchased		(866,715)							(3,500,000)
Shares repurchased		$ (19)			(70)				$ (89)	(19)
Settlement of share-based awards, net		(0.5)			0.6				(1.1)	(0.5)
Distributions to noncontrolling interest		(0.4)										(0.4)
Cumulative effect of adopting new accounting standard			$ 13.7				$ 13.7				$ 13.7
Other		0.2				(0.2)				(0.2)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2019		$ 2,565.1		1.3	77.3	2,347.9		(120.9)	(91.1)	2,214.5		350.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.17
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2018		$ 2,562		1.3	$ 1.2	2,326.1		(116.8)	(1)	2,210.8		351.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		114.6
Other comprehensive (loss) income		(12.7)
Stock-based compensation expense		21.4
Shares repurchased					(2,600,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2019		2,459.3		$ 1.3	$ 0	2,342.1		(130.5)	$ (102.3)	2,110.6		348.7
Common Stock, Shares, Issued				(133,300,000)					(3,600,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Mar. 31, 2019		2,565.1		$ 1.3	77.3	2,347.9		(120.9)	$ (91.1)	2,214.5		350.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		36.8				36.4				36.4		0.4
Other comprehensive (loss) income		(6.2)						(6.5)		(6.5)		0.3
Cash dividends declared on common stock (1)	[1]	(21.6)				(21.6)				(21.6)
Stock-based compensation expense		7.5			7.5					7.5
Settlement of share-based awards, net									500,000
Shares repurchased									(2,133,116)
Shares repurchased		(44)			0				$ (44)	(44)
Settlement of share-based awards, net		(7.5)		$ 0.7	1				$ (8.5)	(7.5)
Distributions to noncontrolling interest		(0.5)										(0.5)
Retirement of treasury stock				6,100,000					6,100,000
Retirement of treasury stock		0			(85.8)	(56.9)			$ (142.7)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2019		$ 2,529.6		$ 1.3	0	2,305.8		(127.4)	$ (0.9)	2,178.8		350.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.17
Common Stock, Shares, Issued				(127,900,000)					(100,000)
$0.01 Par Value		$ 0.01
Net income (loss)		$ 47.7				49				49		(1.3)
Other comprehensive (loss) income		(2.7)						(3.1)		(3.1)		0.4
Cash dividends declared on common stock (1)	[1]	(21.3)				(21.3)				(21.3)
Stock-based compensation expense		8.4			8.4					8.4
Settlement of share-based awards, net									0
Shares repurchased									(5,171,489)
Shares repurchased		(100.9)			0				$ (100.9)	(100.9)
Settlement of share-based awards, net		(0.3)			0.2				(0.5)	(0.3)
Distributions to noncontrolling interest		(1.2)										(1.2)
Retirement of treasury stock		0			(8.6)	8.6				0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2019		$ 2,459.3		$ 1.3	0	2,342.1		(130.5)	$ (102.3)	2,110.6		348.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.17
Common Stock, Shares, Issued				(127,900,000)					(5,300,000)
$0.01 Par Value		$ 0.01
Shares repurchased									(2,933,474)
Shares repurchased									$ (60.8)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Dec. 31, 2019		$ 2,378.9		$ 1.2	0	2,182.9		(153.1)	$ (0.9)	2,030.1		348.8
Common Stock, Shares, Issued				(119,700,000)					100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		162.3				161.7				161.7		0.6
Other comprehensive (loss) income		(23.2)						(23.5)		(23.5)		0.3
Cash dividends declared on common stock (1)	[2]	(24.6)				(24.6)				(24.6)
Stock-based compensation expense		7.3			7.3					7.3
Settlement of share-based awards, net									0
Shares repurchased									(1,850,000)
Shares repurchased		(35.4)							$ (35.4)	(35.4)
Settlement of share-based awards, net		(0.2)			0.7				(0.9)	(0.2)
Cumulative effect of adopting new accounting standard			$ 0.5				0.5				$ 0.5
Other		(0.5)				0.5				0.5
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2020		$ 2,466.1		$ 1.2	8	2,321		(176.6)	(37.2)	2,116.4		349.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.19
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2019		$ 2,378.9		1.2	0	2,182.9		(153.1)	(0.9)	2,030.1		348.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(99.6)
Other comprehensive (loss) income		(10.5)										0.9
Stock-based compensation expense		19.7
Cumulative effect of adopting new accounting standard							$ 0.7
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2020		2,093.6		$ 1.2	5.3	2,066.8		(164.5)	$ (91.5)	1,817.3		276.3
Common Stock, Shares, Issued				(119,700,000)					2,000,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Mar. 31, 2020		2,466.1		$ 1.2	8	2,321		(176.6)	$ (37.2)	2,116.4		349.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(287.8)				(206.9)				(206.9)		(80.9)
Other comprehensive (loss) income		4.6						4.3		4.3		0.3
Cash dividends declared on common stock (1)	[2]	(20.6)				(20.6)				(20.6)
Stock-based compensation expense		7.6			7.6					7.6
Settlement of share-based awards, net				1,500,000					600,000
Shares repurchased									0
Shares repurchased									$ 0
Settlement of share-based awards, net		(9.5)			1.9				$ (11.4)	(9.5)
Retirement of treasury stock				2,500,000					2,500,000
Retirement of treasury stock		0			(17.5)	(30.2)			$ (47.7)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2020		$ 2,160.4		$ 1.2	0	2,063.3		(172.3)	$ (0.9)	1,891.3		269.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.19
Common Stock, Shares, Issued				(118,700,000)					100,000
$0.01 Par Value		$ 0.01
Net income (loss)		$ 25.9				25.1				25.1		0.8
Other comprehensive (loss) income		8.1						7.8		7.8		0.3
Cash dividends declared on common stock (1)	[2]	(21.6)				(21.6)				(21.6)
Stock-based compensation expense		4.8			4.8					4.8
Settlement of share-based awards, net									0
Shares repurchased									(4,466,896)
Shares repurchased		(89.9)							$ (89.9)	(89.9)
Settlement of share-based awards, net		(0.2)			0.5				(0.7)	(0.2)
Contributions from noncontrolling interest		6.1										6.1
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2020		$ 2,093.6		$ 1.2	$ 5.3	$ 2,066.8		$ (164.5)	$ (91.5)	$ 1,817.3		$ 276.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.19
Common Stock, Shares, Issued				(118,700,000)					4,600,000
$0.01 Par Value		$ 0.01
[1]	Dividends of $0.17 per common share for all periods presented in 2019.
[2]	Dividends of $0.19 per common share for all periods presented in 2020.

Derivative Instruments and Fair

Derivative Instruments and Fair Value Accounting	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Accounting	Note 2. Derivative Instruments and Fair Value Accounting Derivative Instruments We use derivative instruments to mitigate the impact of changes in interest rates, both in anticipation of future debt issuances and to offset interest rate variability of certain floating rate debt issuances outstanding. We also may use derivative instruments to mitigate the impact of changes in natural gas and diesel fuel prices and changes in foreign currency exchange rates. Derivative instruments that are designated and qualify as cash flow hedges are accounted for by recording the effective portion of the gain or loss on the derivative instrument in accumulated other comprehensive loss ("AOCL") as a separate component of stockholders' equity and reclassified into earnings in the period during which the hedged transaction affects earnings. We continuously monitor our derivative positions and the credit ratings of our counterparties and do not anticipate losses due to non-performance. See Note 7 for a description of our debt instruments. Interest Rate Hedges Included in accompanying balance sheet at September 30, 2020 Notional Amount Interest Rate (1) Asset/(Liability) AOCL – loss/(income) Noncontrolling Interest (in millions, except %) Expired hedges: 2018 secured railcar equipment notes $ 249.3 4.41 % $ — $ 0.9 $ — TRIP Holdings warehouse loan $ 788.5 3.60 % $ — $ 1.6 $ 2.1 TRIP Master Funding secured railcar equipment notes $ 34.8 2.62 % $ — $ 0.1 $ 0.1 2017 promissory notes - interest rate cap $ 169.3 3.00 % $ — $ (0.5) $ — Open hedge: 2017 promissory notes - interest rate swap $ 494.6 2.66 % $ (50.0) $ 49.5 $ — (1) Weighted average fixed interest rate, except for the interest rate cap on the 2017 promissory notes. Effect on interest expense-increase/(decrease) Three Months Ended Nine Months Ended Expected effect during next twelve months (1) 2020 2019 2020 2019 (in millions) Expired hedges: 2006 secured railcar equipment notes (2) $ — $ — $ (0.1) $ (0.1) $ — 2018 secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.2 TRIP Holdings warehouse loan $ 0.5 $ 0.5 $ 1.5 $ 1.5 $ 1.6 TRIP Master Funding secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.1 2017 promissory notes - interest rate cap $ (0.1) $ — $ (0.1) $ (0.1) $ (0.1) Open hedge: 2017 promissory notes - interest rate swap $ 3.1 $ 0.6 $ 7.8 $ 1.9 $ 10.9 (1) Based on the fair value of open hedges as of September 30, 2020. (2) Upon settlement of the debt in March 2020, the remaining balance of $0.1 million in AOCL was recognized through interest expense. See Note 7 for additional information on the debt redemption. Other Derivatives Included in accompanying balance sheet at September 30, 2020 Effect on cost of revenues – increase/(decrease) Notional Asset/(Liability) AOCL – Three Months Ended Nine Months Ended Expected effect during next twelve months (1) September 30, 2020 September 30, 2020 (in millions) Foreign currency hedge $ 55.0 $ 2.1 $ (2.3) $ 2.3 $ 4.1 $ (2.3) (1) Based on the fair value of open hedges as of September 30, 2020. Our exposure related to foreign currency and commodity transactions is currently hedged for up to a maximum of twelve months. The effect of commodity hedge transactions was immaterial to the Consolidated Financial Statements for all periods presented herein. Fair Value Measurements Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for that asset or liability in an orderly transaction between market participants on the measurement date. An entity is required to establish a fair value hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value are listed below. Level 1 — This level is defined as quoted prices in active markets for identical assets or liabilities. Our cash equivalents and restricted cash are instruments of the U.S. Treasury or highly-rated money market mutual funds. The assets measured as Level 1 in the fair value hierarchy are summarized below: Level 1 September 30, 2020 December 31, 2019 (in millions) Assets: Cash equivalents $ 24.2 $ 57.9 Restricted cash 101.1 111.4 Total assets $ 125.3 $ 169.3 Level 2 — This level is defined as observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Interest rate hedges are valued at exit prices obtained from each counterparty. Foreign currency hedges are valued at exit prices obtained from each counterparty, which are based on currency spot and forward rates and forward points. The assets and liabilities measured as Level 2 in the fair value hierarchy are summarized below: Level 2 September 30, 2020 December 31, 2019 (in millions) Assets: Foreign currency hedge (1) $ 2.1 $ 1.2 Total assets $ 2.1 $ 1.2 Liabilities: Interest rate hedge (2) $ 50.0 $ 28.0 Total liabilities $ 50.0 $ 28.0 (1) Included in other assets in our Consolidated Balance Sheets. (2) Included in accrued liabilities in our Consolidated Balance Sheets. Level 3 — This level is defined as unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. As of September 30, 2020 and December 31, 2019, we have no assets measured as Level 3 in the fair value hierarchy, except as described in Note 10 to this Form 10-Q and Note 10 to the Consolidated Financial Statements included in our 2019 Annual Report on Form 10-K. See Note 10 for more information regarding the non-recurring fair value measurement considerations during the nine months ended September 30, 2020 for the impairment charge related to our small cube covered hopper railcars. See Note 7 for the estimated fair values of our debt instruments. The fair values of all other financial instruments are estimated to approximate carrying value.
Derivative Instruments and Hedging Activities Disclosure [Text Block]	See Note 7 for a description of our debt instruments. Interest Rate Hedges Included in accompanying balance sheet at September 30, 2020 Notional Amount Interest Rate (1) Asset/(Liability) AOCL – loss/(income) Noncontrolling Interest (in millions, except %) Expired hedges: 2018 secured railcar equipment notes $ 249.3 4.41 % $ — $ 0.9 $ — TRIP Holdings warehouse loan $ 788.5 3.60 % $ — $ 1.6 $ 2.1 TRIP Master Funding secured railcar equipment notes $ 34.8 2.62 % $ — $ 0.1 $ 0.1 2017 promissory notes - interest rate cap $ 169.3 3.00 % $ — $ (0.5) $ — Open hedge: 2017 promissory notes - interest rate swap $ 494.6 2.66 % $ (50.0) $ 49.5 $ — (1) Weighted average fixed interest rate, except for the interest rate cap on the 2017 promissory notes. Effect on interest expense-increase/(decrease) Three Months Ended Nine Months Ended Expected effect during next twelve months (1) 2020 2019 2020 2019 (in millions) Expired hedges: 2006 secured railcar equipment notes (2) $ — $ — $ (0.1) $ (0.1) $ — 2018 secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.2 TRIP Holdings warehouse loan $ 0.5 $ 0.5 $ 1.5 $ 1.5 $ 1.6 TRIP Master Funding secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.1 2017 promissory notes - interest rate cap $ (0.1) $ — $ (0.1) $ (0.1) $ (0.1) Open hedge: 2017 promissory notes - interest rate swap $ 3.1 $ 0.6 $ 7.8 $ 1.9 $ 10.9 (1) Based on the fair value of open hedges as of September 30, 2020. (2) Upon settlement of the debt in March 2020, the remaining balance of $0.1 million in AOCL was recognized through interest expense. See Note 7 for additional information on the debt redemption. Other Derivatives Included in accompanying balance sheet at September 30, 2020 Effect on cost of revenues – increase/(decrease) Notional Asset/(Liability) AOCL – Three Months Ended Nine Months Ended Expected effect during next twelve months (1) September 30, 2020 September 30, 2020 (in millions) Foreign currency hedge $ 55.0 $ 2.1 $ (2.3) $ 2.3 $ 4.1 $ (2.3) (1) Based on the fair value of open hedges as of September 30, 2020. Our exposure related to foreign currency and commodity transactions is currently hedged for up to a maximum of twelve months. The effect of commodity hedge transactions was immaterial to the Consolidated Financial Statements for all periods presented herein.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Information	Segment Information We report our operating results in three principal business segments: (1) the Railcar Leasing and Management Services Group, which owns and operates a fleet of railcars and provides third-party fleet leasing, management, and administrative services; (2) the Rail Products Group, which manufactures and sells railcars and related parts and components, and provides railcar maintenance and modification services; and (3) All Other, which includes our highway products business and legal, environmental, and maintenance costs associated with non-operating facilities. In connection with the implementation of our rail-focused strategy, in the first quarter of 2020, we realigned certain activities previously reported in the All Other segment to now be presented within the Rail Products Group. The prior period results have been recast to reflect these changes and present results on a comparable basis. Gains and losses from the sale of property, plant, and equipment are included in the operating profit of each respective segment. Our Chief Operating Decision Maker ("CODM") regularly reviews the operating results of our reportable segments in order to assess performance and allocate resources. Our CODM does not consider impairment of long-lived assets or restructuring activities when evaluating segment operating results; therefore, impairment of long-lived assets and restructuring activities are not allocated to segment profit or loss. Sales and related net profits ("deferred profit") from the Rail Products Group to the Leasing Group are recorded in the Rail Products Group and eliminated in consolidation and are reflected in "Eliminations – Lease Subsidiary" in the tables below. Sales between these groups are recorded at prices comparable to those charged to external customers, taking into consideration quantity, features, and production demand. Amortization of deferred profit on railcars sold to the Leasing Group is included in the operating profit of the Leasing Group, resulting in the recognition of depreciation expense based on our original manufacturing cost of the railcars. Sales of railcars from the lease fleet are included in the Leasing Group, with related gains and losses computed based on the net book value of the original manufacturing cost of the railcars. The financial information for these segments is shown in the tables below (in millions). We operate principally in North America. Three Months Ended September 30, 2020 Railcar Leasing and Management Services Group Rail Products Group All Other Eliminations – Lease Subsidiary Eliminations – Other Consolidated Total External Revenue $ 183.7 $ 213.1 $ 62.6 $ — $ — $ 459.4 Intersegment Revenue 0.2 168.1 — (166.0) (2.3) — Total Revenues $ 183.9 $ 381.2 $ 62.6 $ (166.0) $ (2.3) $ 459.4 Three Months Ended September 30, 2019 Railcar Leasing and Management Services Group Rail Products Group All Other Eliminations – Lease Subsidiary Eliminations – Other Consolidated Total External Revenue $ 326.2 $ 418.8 $ 68.6 $ — $ — $ 813.6 Intersegment Revenue 0.2 316.3 1.7 (314.0) (4.2) — Total Revenues $ 326.4 $ 735.1 $ 70.3 $ (314.0) $ (4.2) $ 813.6 Nine Months Ended September 30, 2020 Railcar Leasing and Management Services Group Rail Products Group All Other Eliminations – Lease Subsidiary Eliminations – Other Consolidated Total External Revenue $ 612.4 $ 777.6 $ 193.8 $ — $ — $ 1,583.8 Intersegment Revenue 0.6 518.6 1.5 (512.4) (8.3) — Total Revenues $ 613.0 $ 1,296.2 $ 195.3 $ (512.4) $ (8.3) $ 1,583.8 Nine Months Ended September 30, 2019 Railcar Leasing and Management Services Group Rail Products Group All Other Eliminations – Lease Subsidiary Eliminations – Other Consolidated Total External Revenue $ 803.3 $ 1,156.6 $ 194.5 $ — $ — $ 2,154.4 Intersegment Revenue 0.6 919.2 5.8 (913.0) (12.6) — Total Revenues $ 803.9 $ 2,075.8 $ 200.3 $ (913.0) $ (12.6) $ 2,154.4 Three Months Ended Nine Months Ended September 30, 2020 2019 2020 2019 (in millions) Operating profit (loss): Railcar Leasing and Management Services Group $ 89.7 $ 115.7 $ 265.5 $ 306.3 Rail Products Group 3.2 65.4 36.2 180.8 All Other 7.3 3.9 23.9 19.9 Segment Totals before Eliminations, Corporate Expenses, Impairment of long-lived assets, and Restructuring activities 100.2 185.0 325.6 507.0 Corporate (21.0) (23.9) (73.3) (78.1) Impairment of long-lived assets — — (369.4) — Restructuring activities, net (4.7) — (10.5) — Eliminations – Lease Subsidiary (2.6) (40.7) (33.5) (109.5) Eliminations – Other 1.0 (0.1) (0.3) (0.3) Consolidated operating profit (loss) $ 72.9 $ 120.3 $ (161.4) $ 319.1 Other (income) expense 53.7 54.0 164.1 161.0 Provision (benefit) for income taxes (6.7) 18.2 (226.1) 41.2 Loss from discontinued operations, net of income taxes — (0.4) (0.2) (2.3) Net income (loss) $ 25.9 $ 47.7 $ (99.6) $ 114.6

Partially-Owned Leasing Subsidi

Partially-Owned Leasing Subsidiaries	9 Months Ended
	Sep. 30, 2020
Noncontrolling Interest [Abstract]
Partially-Owned Leasing Subsidiaries	Partially-Owned Leasing Subsidiaries Through our wholly-owned subsidiary, TILC, we formed two subsidiaries, TRIP Holdings and RIV 2013, for the purpose of providing railcar leasing services in North America for institutional investors. Each of TRIP Holdings and RIV 2013 are direct, partially-owned subsidiaries of TILC in which we have a controlling interest. Each is governed by a seven-member board of representatives, two of whom are designated by TILC. TILC is the agent of each of TRIP Holdings and RIV 2013 and, as such, has been delegated the authority, power, and discretion to take certain actions on behalf of the respective companies. At September 30, 2020, the carrying value of our investment in TRIP Holdings and RIV 2013 totaled $145.4 million. Our weighted average ownership interest in TRIP Holdings and RIV 2013 is 38% while the remaining 62% weighted average interest is owned by third-party, investor-owned funds. The investment in our partially-owned leasing subsidiaries is eliminated in consolidation. Each of TRIP Holdings and RIV 2013 has wholly-owned subsidiaries that are the owners of railcars acquired from our Rail Products and Leasing Groups. These wholly-owned subsidiaries are TRIP Rail Master Funding LLC ("TRIP Master Funding", wholly-owned by TRIP Holdings) and Trinity Rail Leasing 2012 LLC ("TRL-2012", wholly-owned by RIV 2013). Railcar purchases by these subsidiaries were funded by secured borrowings and capital contributions from TILC and third-party equity investors. TILC is the contractual servicer for TRIP Master Funding and TRL-2012, with the authority to manage and service each entity's owned railcars. Our controlling interest in each of TRIP Holdings and RIV 2013 results from our combined role as both equity member and agent/servicer. The noncontrolling interest included in the accompanying Consolidated Balance Sheets represents the non-Trinity equity interest in these partially-owned subsidiaries. Trinity has no obligation to guarantee performance under any of our partially-owned subsidiaries' (or their respective subsidiaries') debt agreements, guarantee any railcar residual values, shield any parties from losses or guarantee minimum yields. The assets of each of TRIP Master Funding and TRL-2012 may only be used to satisfy the particular subsidiary's liabilities, and the creditors of each of TRIP Master Funding and TRL-2012 have recourse only to the particular subsidiary's assets. Each of TILC and the third-party equity investors receive distributions from TRIP Holdings and RIV 2013, when available, in proportion to its respective equity interests, and has an interest in the net assets of the partially-owned subsidiaries upon a liquidation event in the same proportion. TILC is paid fees for the services it provides to TRIP Master Funding and TRL-2012 and has the potential to earn certain incentive fees. TILC and the third-party equity investors have commitments to provide additional equity funding to TRIP Holdings that are scheduled to expire in May 2021, contingent upon certain returns on investment in TRIP Holdings and other conditions being met. There are no remaining equity commitments with respect to RIV 2013. See Note 7 regarding the debt of TRIP Holdings and RIV 2013 and their respective subsidiaries. See Note 10 for further information regarding impairment of long-lived assets related to our small cube covered hopper railcars recorded in the nine months ended September 30, 2020.

Railcar Leasing and Management

Railcar Leasing and Management Services Group	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Railcar Leasing and Management Services Group	The Railcar Leasing and Management Services Group owns and operates a fleet of railcars as well as provides third-party fleet leasing, management, and administrative services. Selected consolidated financial information for the Leasing Group is as follows: September 30, 2020 Wholly- Partially-Owned Subsidiaries Total Leasing Group Eliminations — Lease Subsidiary (1) Adjusted Total Leasing Group (in millions) Cash and cash equivalents $ 2.5 $ — $ 2.5 $ — $ 2.5 Accounts receivable 81.3 9.2 90.5 — 90.5 Property, plant, and equipment, net (2) 5,692.5 1,637.8 7,330.3 (826.8) 6,503.5 Restricted cash 73.0 28.1 101.1 — 101.1 Other assets 38.1 1.2 39.3 — 39.3 Total assets $ 5,887.4 $ 1,676.3 $ 7,563.7 $ (826.8) $ 6,736.9 Accounts payable and accrued liabilities $ 148.6 $ 30.4 $ 179.0 $ — $ 179.0 Debt, net 3,172.7 1,239.3 4,412.0 — 4,412.0 Deferred income taxes 925.3 1.2 926.5 (193.8) 732.7 Other liabilities 26.9 — 26.9 — 26.9 Total liabilities 4,273.5 1,270.9 5,544.4 (193.8) 5,350.6 Noncontrolling interest — 276.3 276.3 — 276.3 Total Equity $ 1,613.9 $ 129.1 $ 1,743.0 $ (633.0) $ 1,110.0 December 31, 2019 Wholly- Partially-Owned Subsidiaries Total Leasing Group Eliminations — Lease Subsidiary (1) Adjusted Total Leasing Group (in millions) Cash and cash equivalents $ 1.8 $ — $ 1.8 $ — $ 1.8 Accounts receivable 73.9 8.7 82.6 — 82.6 Property, plant, and equipment, net 5,818.9 1,786.7 7,605.6 (903.8) 6,701.8 Restricted cash 78.4 33.0 111.4 — 111.4 Other assets 209.8 1.4 211.2 — 211.2 Total assets $ 6,182.8 $ 1,829.8 $ 8,012.6 $ (903.8) $ 7,108.8 Accounts payable and accrued liabilities $ 100.7 $ 44.6 $ 145.3 $ — $ 145.3 Debt, net 3,080.7 1,278.4 4,359.1 — 4,359.1 Deferred income taxes 861.7 1.1 862.8 (184.8) 678.0 Other liabilities 32.7 — 32.7 — 32.7 Total liabilities 4,075.8 1,324.1 5,399.9 (184.8) 5,215.1 Noncontrolling interest — 348.8 348.8 — 348.8 Total Equity $ 2,107.0 $ 156.9 $ 2,263.9 $ (719.0) $ 1,544.9 (1) Net deferred profit on railcars sold to the Leasing Group consists of intersegment profit that is eliminated in consolidation. Net deferred profit and the related deferred tax impact are included as adjustments to the property, plant, and equipment, net and deferred income taxes line items, respectively, in the Eliminations – Lease Subsidiary column above to reflect the net book value of the railcars purchased by the Leasing Group from the Rail Products Group based on manufacturing cost. See Note 4 and Note 7 for a further discussion regarding our investment in our partially-owned leasing subsidiaries and the related indebtedness. (2) See Note 10 for further information regarding impairment of long-lived assets recorded in the nine months ended September 30, 2020. Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 Percent 2020 2019 Percent ($ in millions) Change ($ in millions) Change Revenues: Leasing and management $ 183.9 $ 190.1 (3.3) % $ 558.6 $ 566.6 (1.4) % Sales of railcars owned one year or less at the time of sale (1) — 136.3 (100.0) % 54.4 237.3 (77.1) % Total revenues $ 183.9 $ 326.4 (43.7) % $ 613.0 $ 803.9 (23.7) % Operating profit (2) : Leasing and management $ 86.8 $ 79.8 8.8 % $ 247.8 $ 234.6 5.6 % Railcar sales: Railcars owned one year or less at the time of sale — 17.8 (100.0) % 0.4 27.0 (98.5) % Railcars owned more than one year at the time of sale 2.9 18.1 (84.0) % 17.3 44.7 (61.3) % Total operating profit $ 89.7 $ 115.7 (22.5) % $ 265.5 $ 306.3 (13.3) % Total operating profit margin 48.8 % 35.4 % 43.3 % 38.1 % Leasing and management operating profit margin 47.2 % 42.0 % 44.4 % 41.4 % Selected expense information: Depreciation (3)(4) $ 51.5 $ 59.4 (13.3) % $ 159.1 $ 171.6 (7.3) % Maintenance and compliance $ 18.5 $ 24.9 (25.7) % $ 67.4 $ 79.2 (14.9) % Rent $ 2.1 $ 3.8 (44.7) % $ 8.1 $ 13.6 (40.4) % Selling, engineering, and administrative expenses $ 11.7 $ 10.7 9.3 % $ 39.0 $ 36.2 7.7 % Interest $ 47.0 $ 50.0 (6.0) % $ 149.2 $ 146.4 1.9 % (1) Includes revenues associated with sales-type leases of $26.3 million and $60.5 million for the three and nine months ended September 30, 2019, respectively. (2) Operating profit includes: depreciation; maintenance and compliance; rent; and selling, engineering, and administrative expenses. Amortization of deferred profit on railcars sold from the Rail Products Group to the Leasing Group is included in the operating profit of the Leasing Group, resulting in the recognition of depreciation expense based on our original manufacturing cost of the railcars. Interest expense is not a component of operating profit and includes the effect of hedges. (3) Effective January 1, 2020, we revised the estimated useful lives and salvage values of certain railcar types in our lease fleet. This change in estimate resulted in a decrease in depreciation expense in the three and nine months ended September 30, 2020 of approximately $7.7 million and $23.1 million, respectively. This decrease was partially offset by higher depreciation associated with growth in the lease fleet. See Note 1 of the Consolidated Financial Statements for further information. (4) As a result of the impairment of long-lived assets related to our small cube covered hopper railcars recorded in the second quarter of 2020, our quarterly depreciation expense beginning in the third quarter of 2020 has decreased by approximately $3.5 million. During the three and nine months ended September 30, 2020 and 2019, information related to the sales of leased railcars is as follows: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (in millions) Sales of leased railcars: Railcars owned one year or less at the time of sale (1) $ — $ 136.3 $ 54.4 $ 237.3 Railcars owned more than one year at the time of sale 6.5 75.1 138.7 175.0 $ 6.5 $ 211.4 $ 193.1 $ 412.3 Operating profit on sales of leased railcars: Railcars owned one year or less at the time of sale $ — $ 17.8 $ 0.4 $ 27.0 Railcars owned more than one year at the time of sale 2.9 18.1 17.3 44.7 $ 2.9 $ 35.9 $ 17.7 $ 71.7 Operating profit margin on sales of leased railcars: Railcars owned one year or less at the time of sale — % 13.1 % 0.7 % 11.4 % Railcars owned more than one year at the time of sale 44.6 % 24.1 % 12.5 % 25.5 % Weighted average operating profit margin on sales of leased railcars 44.6 % 17.0 % 9.2 % 17.4 % (1) Includes revenues associated with sales-type leases of $26.3 million and $60.5 million for the three and nine months ended September 30, 2019, respectively. Railcar Leasing Equipment Portfolio. The Leasing Group's equipment consists primarily of railcars leased by third parties. The Leasing Group purchases equipment manufactured predominantly by the Rail Products Group and enters into lease contracts with third parties with terms generally ranging between one year and ten years, although certain leases entered into in prior periods had lease terms of up to twenty years. The Leasing Group primarily enters into operating leases. Future contractual minimum rental revenues on operating leases related to our wholly-owned and partially-owned subsidiaries are as follows: Remaining three months of 2020 2021 2022 2023 2024 Thereafter Total (in millions) Future contractual minimum rental revenues $ 150.3 $ 511.2 $ 402.8 $ 295.2 $ 214.5 $ 391.5 $ 1,965.5 Debt. Wholly-owned subsidiaries. The Leasing Group’s debt at September 30, 2020 consisted primarily of non-recourse debt. As of September 30, 2020, Trinity’s wholly-owned subsidiaries included in the Leasing Group held equipment with a net book value of $4,249.1 million, which is pledged solely as collateral for Leasing Group debt held by those subsidiaries. The net book value of unpledged equipment at September 30, 2020 was $1,431.3 million. See Note 7 for more information regarding the Leasing Group debt. Partially-owned subsidiaries. Debt owed by TRIP Holdings and RIV 2013 and their respective subsidiaries is nonrecourse to Trinity and TILC. Creditors of each of TRIP Holdings and RIV 2013 and their respective subsidiaries have recourse only to the particular subsidiary's assets. TRIP Master Funding equipment with a net book value of $1,159.5 million is pledged solely as collateral for the TRIP Master Funding debt. TRL-2012 equipment with a net book value of $478.3 million is pledged solely as collateral for the TRL-2012 secured railcar equipment notes. See Note 4 for a description of TRIP Holdings and RIV 2013. Operating Lease Obligations. Future amounts due as well as future contractual minimum rental revenues related to the Leasing Group's railcar operating lease obligations are as follows: Remaining three months of 2020 2021 2022 2023 2024 Thereafter Total (in millions) Future operating lease obligations $ 2.1 $ 8.2 $ 7.5 $ 5.7 $ 2.5 $ 0.9 $ 26.9 Future contractual minimum rental revenues $ 1.7 $ 5.3 $ 3.7 $ 1.7 $ 0.7 $ 0.1 $ 13.2

Property, Plant, and Equipment

Property, Plant, and Equipment	9 Months Ended
	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	Property, Plant, and Equipment The following table summarizes the components of property, plant, and equipment: September 30, 2020 December 31, 2019 (in millions) Manufacturing/Corporate: Land $ 28.6 $ 28.4 Buildings and improvements 416.2 402.2 Machinery and other 556.3 546.7 Construction in progress 88.4 63.1 1,089.5 1,040.4 Less: accumulated depreciation (655.1) (631.6) 434.4 408.8 Leasing: Wholly-owned subsidiaries: Machinery and other 13.9 13.7 Equipment on lease 6,868.7 6,944.2 6,882.6 6,957.9 Less: accumulated depreciation (1,190.1) (1,139.0) 5,692.5 5,818.9 Partially-owned subsidiaries: Equipment on lease 2,245.6 2,410.0 Less: accumulated depreciation (607.8) (623.3) 1,637.8 1,786.7 Deferred profit on railcars sold to the Leasing Group (1,063.8) (1,135.8) Less: accumulated amortization 237.0 232.0 (826.8) (903.8) $ 6,937.9 $ 7,110.6 In early 2020, we finalized an assessment of the estimated useful lives and salvage value assumptions for the railcars in our lease fleet. This resulted in a revision to the useful lives and salvage values of certain railcar types in our lease fleet. See Note 1 for further information. See Note 10 for further information regarding impairment of long-lived assets recorded in the nine months ended September 30, 2020.

Debt

Debt	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Debt	Debt The carrying amounts of our long-term debt are as follows: September 30, 2020 December 31, 2019 (in millions) Corporate – Recourse: Revolving credit facility $ 125.0 $ 125.0 Senior notes, net of unamortized discount of $0.2 and $0.2 399.8 399.8 524.8 524.8 Less: unamortized debt issuance costs (1.7) (2.0) Total recourse debt 523.1 522.8 Leasing – Non-recourse: Wholly-owned subsidiaries: Secured railcar equipment notes, net of unamortized discount of $1.1 and $2.0 1,948.8 2,124.1 2017 promissory notes, net of unamortized discount of $10.7 and $— 813.7 627.1 TILC warehouse facility 430.5 353.4 3,193.0 3,104.6 Less: unamortized debt issuance costs (20.3) (23.9) 3,172.7 3,080.7 Partially-owned subsidiaries: Secured railcar equipment notes 1,248.9 1,289.3 Less: unamortized debt issuance costs (9.6) (10.9) 1,239.3 1,278.4 Total non–recourse debt 4,412.0 4,359.1 Total debt $ 4,935.1 $ 4,881.9 Estimated Fair Value of Debt — The estimated fair value of our 4.55% senior notes due 2024 ("Senior Notes") is based on a quoted market price in a market with little activity (Level 2 input). The estimated fair values of our secured railcar equipment notes are based on our estimate of their fair value using unobservable input values provided by a third party (Level 3 inputs). The respective carrying values of our revolving credit facility, TILC warehouse facility, and 2017 promissory notes approximate fair value because the interest rate adjusts to the market interest rate. The estimated fair values of our long-term debt are as follows: September 30, 2020 December 31, 2019 (in millions) Level 1 $ 1,369.2 $ 1,105.5 Level 2 407.4 411.7 Level 3 3,384.7 3,547.4 $ 5,161.3 $ 5,064.6 Revolving Credit Facility — We have a $450.0 million unsecured corporate revolving credit facility. During the nine months ended September 30, 2020, we had total borrowings of $455.0 million and total repayments of $455.0 million under the revolving credit facility. Additionally, we had outstanding letters of credit issued in an aggregate principal amount of $35.2 million. Of the $289.8 million remaining unused amount, $278.7 million is available for borrowing as of September 30, 2020. The outstanding letters of credit as of September 30, 2020 are scheduled to expire in July 2021. The revolving credit facility bears interest at a variable rate which resulted in an interest rate of LIBOR plus 1.50%, with a LIBOR floor of 0.30%, as of September 30, 2020. A commitment fee accrues on the average daily unused portion of the revolving facility at the rate of 0.175% to 0.30% (0.20% as of September 30, 2020). The revolving credit facility requires the maintenance of ratios related to minimum interest coverage for the leasing and manufacturing operations and maximum leverage. In July 2020, we amended our revolving credit facility to increase the maximum leverage ratio to provide additional near-term flexibility through December 31, 2021. As of September 30, 2020, we were in compliance with all such financial covenants. TILC Warehouse Loan Facility — TILC has a $750.0 million warehouse loan facility, which was established to finance railcars owned by TILC. During the nine months ended September 30, 2020, we had total borrowings of $168.5 million and total repayments of $91.4 million under the TILC warehouse loan facility. The entire unused facility amount of $319.5 million was available as of September 30, 2020 based on the amount of warehouse-eligible, unpledged equipment. Advances under the facility bear interest at a defined index rate plus a margin, for an all-in interest rate of 1.76% at September 30, 2020. Early Redemption of TRL V — In March 2020, Trinity Rail Leasing V, L.P., a limited partnership (“TRL V”) and a limited purpose, indirect wholly-owned subsidiary of the Company owned through TILC, redeemed its 2006 Secured Railcar Equipment Notes due May 2036, of which $104.7 million was outstanding at the redemption date. The fixed interest rate for these notes was at 5.90% per annum. In connection with the early redemption, we recognized a loss on extinguishment of debt of $5.0 million, which included a $4.7 million early redemption premium and $0.3 million in unamortized debt issuance costs. The loss on extinguishment of debt is included in interest expense in our Consolidated Statement of Operations. TRL-2017 — In July 2020, Trinity Rail Leasing 2017 LLC (“TRL-2017”), a wholly-owned subsidiary of the Company, issued an additional $225.0 million of promissory notes pursuant to a provision contained in its existing Amended and Restated Loan Agreement dated November 8, 2018 (together with previously-issued promissory notes, the "2017 Promissory Notes"). The 2017 Promissory Notes bear interest at a rate of LIBOR plus 1.50%, payable monthly. The 2017 Promissory Notes are obligations of TRL-2017 and are non-recourse to Trinity. The 2017 Promissory Notes are secured by a portfolio of railcars and operating leases thereon, certain cash reserves, and other assets acquired and owned by TRL-2017. Net proceeds received from the transaction were used to repay approximately $48.3 million of borrowings under TILC's secured warehouse credit facility, and the remaining proceeds were used to repay borrowings under the Company’s revolving credit facility, and for general corporate purposes. Subsequent Event — In October 2020, Trinity Rail Leasing 2018 LLC (“TRL-2018”), a wholly-owned subsidiary of the Company, issued $155.5 million of Series 2020-1 Class A Secured Railcar Equipment Notes (the “2020-1 Notes”) under an existing indenture. The 2020-1 Notes bear interest at a fixed rate of 1.96% per annum and have a stated final maturity date of 2050. In a separate transaction during October 2020, TRL-2018 redeemed its Series 2018-1 Class A-1 Secured Railcar Equipment Notes, of which $153.1 million was outstanding at the redemption date. The fixed interest rate for these notes was 3.82% per annum.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the "CARES Act") was enacted. The CARES Act is a stimulus package that is a part of a series of bills meant to address the economic uncertainties associated with COVID-19. Due to the enactment of the CARES Act, Trinity filed a carryback claim for the 2018 and 2019 tax losses to the 2013-2015 tax years, allowing us to recover taxes that were previously paid. The income taxes associated with the carryback claims were paid at a federal rate of 35.0%, rather than the current rate of 21.0% in effect beginning with the 2018 tax year. The net deferred tax liability was remeasured and a federal income tax receivable was set up to account for the net operating losses permitted to be carried back under the CARES Act, resulting in a tax benefit of $174.6 million for the nine months ended September 30, 2020. The effective tax rates for the three and nine months ended September 30, 2020 were a benefit of 34.9% and a benefit of 69.5%, respectively, which differ from the U.S. statutory rate of 21.0% primarily due to the impact of the CARES Act. The effective tax benefit rate for the nine months ended September 30, 2020 was partially offset by the portion of the non-cash impairment charge that is not tax-effected because it is related to the noncontrolling interest. Our effective tax expense rates for the three and nine months ended September 30, 2019 were 27.5% and 26.1%, respectively. These differ from the U.S. statutory rate primarily due to the impacts of state income taxes, the incremental tax on profits of branches taxed in both U.S. and foreign jurisdictions, tax return true-ups, the establishment of nexus in additional states, and non-deductible executive compensation. Income tax refunds received, net of payments, during the nine months ended September 30, 2020 totaled $1.3 million. The total income tax receivable position as of September 30, 2020 was $485.0 million, of which approximately $307.1 million relates to the 2018 and 2019 carryback claims and approximately $169.7 million accrued to date for the 2020 anticipated carryback claim, which we expect will be realized in 2021.

Employee Retirement Plans

Employee Retirement Plans	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Employee Retirement Plans	Employee Retirement Plans The following table summarizes the components of our net retirement cost: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (in millions) Expense Components Service cost $ — $ — $ — $ 0.1 Interest 3.8 5.0 11.2 14.8 Expected return on plan assets (5.3) (5.8) (15.7) (17.3) Amortization of actuarial loss 1.5 1.2 4.5 3.4 Amortization of prior service cost 0.3 — 0.9 — Net periodic benefit cost 0.3 0.4 0.9 1.0 Profit sharing 1.9 3.1 6.5 8.3 Net expense $ 2.2 $ 3.5 $ 7.4 $ 9.3 We had no contributions to our defined benefit pension plans for all periods presented, and we do not anticipate any contributions in 2020. The non-service cost components of net periodic benefit cost in the table above are included in other, net (income) expense in our Consolidated Statements of Operations. Planned Pension Plan Termination On September 4, 2019, our Board of Directors approved the termination of the Trinity Industries, Inc. Consolidated Pension Plan (the "Pension Plan"), effective December 31, 2019. Except for retirees currently receiving payments under the Pension Plan, participants will have the choice of receiving a single lump sum payment or an annuity from a highly-rated insurance company that will pay and administer future benefit payments. The Pension Plan is expected to be settled in the fourth quarter of 2020, which would then result in the Company no longer having any remaining funded pension plan obligations. Upon settlement, we currently expect to recognize a pre-tax non-cash pension settlement charge totaling between $145 million and $160 million, which is inclusive of all actuarial losses currently recorded in AOCL. The settlement charge is expected to be recognized in our Statement of Operations during the fourth quarter when payments are made to those participants electing to receive a lump sum distribution and when the annuity contracts are purchased to settle all remaining outstanding pension obligations. We believe that our current pension assets will be sufficient to settle the Pension Plan liability. The actual amount of the settlement charge and any potential cash contribution or surplus will depend on interest rates, Pension Plan asset returns, the lump-sum election rate, and other factors.

Restructuring Activities (Notes

Restructuring Activities (Notes)	9 Months Ended
	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure [Text Block]	Throughout 2020, we have continued our efforts to better align support services with our rail-focused strategy, which has resulted in headcount reductions across multiple functions, including certain corporate and operational support functions primarily at our Dallas headquarters. Additionally, we executed a lease agreement on a new headquarters facility to better suit our new organizational structure, which prompted the need to perform a recoverability test on our existing corporate headquarters campus to evaluate for impairment. This test indicated that the carrying value was not recoverable. The fair value of our corporate headquarters campus was measured based on a third-party valuation estimate using Level 2 and Level 3 inputs in the fair value hierarchy and resulted in a non-cash impairment charge in the first quarter of $5.2 million during the nine months ended September 30, 2020. During the three months ended September 30, 2020, we recorded total restructuring charges of $4.7 million, consisting of $3.4 million for severance costs, $0.7 million in asset write-downs associated with transportation equipment in our logistics operations, and $0.6 million of contract termination costs. During the nine months ended September 30, 2020, we recorded total restructuring charges of $10.5 million, consisting of $7.5 million for severance costs, $5.9 million of non-cash charges primarily from the write-down of our corporate headquarters campus described above and certain other assets, and $0.6 million in contract termination costs, partially offset by a $3.5 million net gain on the disposition of a non-operating facility and certain related assets. Other restructuring actions associated with these plans are expected to be substantially completed in 2020. As we continue to reposition the organization, it is possible that we will engage in additional restructuring activities in the near term. The following table sets forth the restructuring activity and balance of the restructuring liability, which is included in other liabilities in our Consolidated Balance Sheet: Accrued charges as of December 31, 2019 Charges and adjustments Payments Accrued charges as of September 30, 2020 (in millions) Cash charges: Employee severance costs $ 3.4 $ 7.5 $ (8.8) $ 2.1 Contract termination costs — 0.6 — 0.6 $ 3.4 $ 8.1 $ (8.8) $ 2.7 Asset impairment charges: Write-down of assets $ 5.9 Gain on disposition of assets (3.5) $ 2.4 Total restructuring activities $ 10.5 Although restructuring activities are not allocated to our reportable segments, the following table summarizes the restructuring activities by reportable segment: Three Months Ended September 30, 2020 Employee Severance Costs Contract Termination Costs Write-down of Assets Total (in millions) Railcar Leasing and Management Services Group $ 1.4 $ — $ — $ 1.4 Rail Products Group 1.3 0.2 0.7 2.2 All Other 0.1 — — 0.1 Corporate 0.6 0.4 — 1.0 Total restructuring activities $ 3.4 $ 0.6 $ 0.7 $ 4.7 Nine Months Ended September 30, 2020 Employee Severance Costs Contract Termination Costs Gain on Disposition of Assets Write-down of Assets Total (in millions) Railcar Leasing and Management Services Group $ 1.4 $ — $ — $ — $ 1.4 Rail Products Group 3.9 0.2 — 0.7 4.8 All Other 0.2 — (3.5) — (3.3) Corporate 2.0 0.4 — 5.2 7.6 Total restructuring activities $ 7.5 $ 0.6 $ (3.5) $ 5.9 $ 10.5
Asset Impairment Charges	We monitor the carrying value of long-lived assets and right-of-use assets for potential impairment. The carrying value of long-lived assets and right-of-use assets is considered impaired when the asset's carrying value is not recoverable through undiscounted future cash flows and the asset's carrying value exceeds its fair value. During the second quarter, the oil and gas proppants (or “frac sand”) industry continued to experience economic pressure created by low oil prices, reduced fracking activity, and the ongoing economic impact of COVID-19. Significant price declines in the crude oil market, as well as lower demand for certain commodities, resulted in a decline in customer demand for certain types of railcars. In particular, small cube covered hopper railcars are primarily used in North America to serve the frac sand industry. In recent years, these railcars primarily transported Northern White sand from Wisconsin and other locations in the Midwest for use in fracking operations, including operations located in the Permian Basin. However, given the decline in global oil prices, reduced fracking activity, and pressure on the oil and gas industry to maintain a low cost structure, fracking operations, particularly those located in the Permian Basin, have increasingly shifted away from the use of Northern White sand and towards the use of in-basin sand, which can be sourced locally rather than transporting by rail. Consequently, the cash flows and profitability of the frac sand industry continued to decline during the second quarter. As a result, certain of the Leasing Group's small cube covered hopper customers requested rent relief and, in a number of cases, filed for bankruptcy in the second quarter. We believe that the collective impact of these developments, including the shift towards the use of in-basin sand, constituted a fundamental and other-than-temporary change in the future demand for this railcar type. Therefore, we determined that the events and circumstances that arose during the second quarter of 2020 constituted an impairment triggering event related to the small cube covered hopper car type in our lease fleet portfolio. We performed a cash flow recoverability test of our small cube covered hopper railcars and compared the undiscounted cash flows to the carrying value of the assets. This analysis indicated that the carrying value exceeded the estimated undiscounted cash flows, and therefore, we were required to measure the fair value of our fleet of small cube covered hopper railcars and determine the amount of an impairment loss, if any. The fair value of the asset group was determined using an income approach, which we believe most accurately reflects a market participant's viewpoint in valuing these railcars. The results of our analysis indicated an estimated fair value of the asset group of approximately $191.7 million, in comparison to the asset group's carrying amount of $550.0 million, net of deferred profit. As a result, during the second quarter, we recorded a pre-tax non-cash impairment charge of $358.3 million related to our small cube covered hopper railcars. Additionally, we evaluated the right-of-use assets associated with our leased-in portfolio of small cube covered hopper railcars and determined that these assets were impaired based on consideration of an expected decline in future cash flows over the remaining lease term, which resulted in an additional pre-tax non-cash impairment charge of approximately $11.1 million. The aggregate impairment charge of $369.4 million is reflected in the impairment of long-lived assets line of our Consolidated Statements of Operations for the nine months ended September 30, 2020. Significant management judgment was used to determine the key assumptions utilized in our impairment analysis, the substantial majority of which represent unobservable (Level 3) inputs. These assumptions include, but are not limited to: estimates regarding the remaining useful life over which the railcars are expected to generate cash flows; average lease rates; railcar utilization percentages; operating expenses; and the selection of an appropriate discount rate. Management selected these estimates and assumptions based on our railcar industry expertise. We also consulted with third-party energy and frac sand industry experts to gain insights with respect to the long-term outlook for these underlying markets. Although we believe the estimates utilized in our analysis were reasonable, any change in these estimates could materially affect the amount of the impairment charge.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Changes in AOCL for the nine months ended September 30, 2020 are as follows: Currency translation adjustments Unrealized gain/(loss) on derivative financial instruments Net actuarial gains/(losses) and prior service costs of defined benefit plans Accumulated Other Comprehensive Loss (in millions) Balances at December 31, 2019 $ (1.3) $ (17.9) $ (133.9) $ (153.1) Other comprehensive loss, net of tax, before reclassifications — (25.3) — (25.3) Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $—, $3.0, $1.2, and $4.2 — 10.6 4.2 14.8 Less: noncontrolling interest — (0.9) — (0.9) Other comprehensive income (loss) — (15.6) 4.2 (11.4) Balances at September 30, 2020 $ (1.3) $ (33.5) $ (129.7) $ (164.5) See Note 2 for information on the reclassification of amounts in AOCL into earnings. Reclassifications of unrealized before-tax gains and losses on derivative financial instruments are included in interest expense for our interest rate hedges and in cost of revenues for our foreign currency hedges in our Consolidated Statements of Operations. Reclassifications of before-tax net actuarial gains/(losses) and prior service costs of defined benefit plans are included in other, net (income) expense in our Consolidated Statements of Operations.

Common Stock and Stock-Based Co

Common Stock and Stock-Based Compensation	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Note 12. Common Stock and Stock-Based Compensation Stockholders' Equity In March 2019, our Board of Directors authorized a share repurchase program effective March 7, 2019 through December 31, 2020. The share repurchase program authorized the Company to repurchase up to $350.0 million of its common stock, not to exceed 13.7 million shares. On April 24, 2020, as a result of then-current market conditions, the Board of Directors amended the repurchase program to remove the share limitation. Share repurchase activity under this program is as follows: Shares Repurchased Remaining Authorization to Repurchase Period Number of shares Cost Cost March 7, 2019 Authorization $ 350.0 March 7, 2019 through March 31, 2019 866,715 $ 19.0 $ 331.0 April 1, 2019 through June 30, 2019 2,133,116 44.0 $ 287.0 July 1, 2019 through September 30, 2019 5,171,489 100.9 $ 186.1 October 1, 2019 through December 31, 2019 2,933,474 60.8 $ 125.3 January 1, 2020 through March 31, 2020 1,850,000 35.4 $ 89.9 April 1, 2020 through June 30, 2020 — — $ 89.9 July 1, 2020 through September 30, 2020 4,466,896 89.9 $ — Total 17,421,690 $ 350.0 In the third quarter of 2020, we completed the existing share repurchase program. Certain shares of stock repurchased during September 2020, totaling $4.9 million, were cash settled in October 2020 in accordance with normal settlement practices. In addition to the amounts reported in the table above, share repurchases for the nine months ended September 30, 2019 included 2.6 million shares at a cost of approximately $70.0 million representing the final settlement of an accelerated share repurchase program, which was funded in November 2018 but a portion of which remained outstanding as of December 31, 2018. Subsequent event — In October 2020, our Board of Directors authorized a new share repurchase program effective October 23, 2020 through December 31, 2021. The new share repurchase program authorizes the Company to repurchase up to $250.0 million of its common stock. Stock-Based Compensation Stock-based compensation totaled approximately $4.8 million and $19.7 million for the three and nine months ended September 30, 2020, respectively. Stock-based compensation totaled approximately $8.4 million and $21.4 million for the three and nine months ended September 30, 2019, respectively. The Company's annual grant of share-based awards generally occurs in the second quarter under our 2004 Fourth Amended and Restated Stock Option and Incentive Plan (the "Plan”). Our stock options have contractual terms of ten years. Expense related to stock options issued to eligible employees under the Plan is recognized over their vesting period on a straight-line basis, generally three years. Expense related to restricted stock units ("RSUs") issued to eligible employees under the Plan is recognized ratably over the vesting period, generally between three years and four years. Certain RSU grants made in 2020 provide for full vesting when the award recipients reach 60 years of age and have provided at least 10 years of service to the Company, provided that the awards remain outstanding for a period of six months from the date of grant. The expense for these awards is recognized over the applicable service period for each of the eligible award recipients. Expense related to performance units is recognized ratably from their award date to the end of the performance period, generally three years. Expense related to restricted stock awards ("RSAs") and RSUs granted to non-employee directors under the Plan is recognized ratably over the vesting period, generally one year. The following table summarizes stock-based compensation awards granted during the nine months ended September 30, 2020: Number of Shares Granted Weighted Average Grant-Date Fair Value per Award Stock options 300,000 $ 5.26 Restricted stock units 988,309 $ 18.59 Restricted stock awards 20,939 $ 18.51 Performance units 444,252 $ 20.31 The fair value of the stock options granted was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions: Nine Months Ended September 30, 2020 Exercise price $ 21.61 Risk-free interest rate 1.48 % Expected life (in years) 6.50 Equity volatility 35.00 % Dividend yield 3.42 %

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share Basic net income attributable to Trinity Industries, Inc. per common share ("EPS") is computed by dividing net income attributable to Trinity remaining after allocation to unvested restricted shares by the weighted average number of basic common shares outstanding for the period. Except when the effect would be antidilutive, the calculation of diluted EPS includes the net impact of unvested RSAs and RSUs. Total weighted average restricted shares were 4.2 million and 4.7 million shares for the three and nine months ended September 30, 2020, respectively. Approximately 0.3 million restricted shares and 0.3 million stock options were excluded from the EPS calculation for the three months ended September 30, 2020, as their effect would have been antidilutive. There were no restricted shares and stock options included in the computation of diluted earnings per common share for the nine months ended September 30, 2020 as we incurred a loss for the period, and any effect on loss per common share would have been antidilutive. Total weighted average restricted shares were 5.5 million shares for the three and nine months ended September 30, 2019. Approximately 1.2 million and 0.2 million of these restricted shares were excluded from the EPS calculation for the three and nine months ended September 30, 2019, respectively, as their effect would have been antidilutive. The computation of basic and diluted net income attributable to Trinity Industries, Inc. is as follows. Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (in millions, except per share amounts) Income (loss) from continuing operations $ 25.9 $ 48.1 $ (99.4) $ 116.9 Less: Net (income) loss attributable to noncontrolling interest (0.8) 1.3 79.5 1.4 Unvested restricted share participation — continuing operations (0.2) (0.6) — (1.6) Net income (loss) from continuing operations attributable to Trinity Industries, Inc. 24.9 48.8 (19.9) 116.7 Net loss from discontinued operations, net of income taxes — (0.4) (0.2) (2.3) Unvested restricted share participation — discontinued operations — — — — Net loss from discontinued operations attributable to Trinity Industries, Inc. — (0.4) (0.2) (2.3) Net income (loss) attributable to Trinity Industries, Inc., including the effect of unvested restricted share participation $ 24.9 $ 48.4 $ (20.1) $ 114.4 Basic weighted average shares outstanding 116.4 124.7 117.2 127.6 Effect of dilutive securities: Nonparticipating unvested RSUs and RSAs 0.6 1.3 — 1.6 Diluted weighted average shares outstanding 117.0 126.0 117.2 129.2 Basic earnings per common share: Income (loss) from continuing operations $ 0.21 $ 0.39 $ (0.17) $ 0.91 Income (loss) from discontinued operations — — — (0.02) Basic net income (loss) attributable to Trinity Industries, Inc. $ 0.21 $ 0.39 $ (0.17) $ 0.89 Diluted earnings per common share: Income (loss) from continuing operations $ 0.21 $ 0.39 $ (0.17) $ 0.90 Income (loss) from discontinued operations — — — (0.02) Diluted net income (loss) attributable to Trinity Industries, Inc. $ 0.21 $ 0.39 $ (0.17) $ 0.88

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Highway products litigation We previously reported the filing of a False Claims Act (“FCA”) complaint in the United States District Court for the Eastern District of Texas, Marshall Division (“District Court”) styled Joshua Harman, on behalf of the United States of America, Plaintiff/Relator v. Trinity Industries, Inc., Defendant , Case No. 2:12-cv-00089-JRG (E.D. Tex.). In this case, in which the U.S. Government declined to intervene, the relator, Mr. Joshua Harman, alleged the Company violated the FCA pertaining to sales of the Company's ET-Plus® System, a highway guardrail end-terminal system (“ET Plus”). On October 20, 2014, a trial in this case concluded with a jury verdict stating that the Company and its subsidiary, Trinity Highway Products, LLC (“Trinity Highway Products”), “knowingly made, used or caused to be made or used, a false record or statement material to a false or fraudulent claim," and the District Court entered judgment on the verdict in the total amount of $682.4 million. On September 29, 2017, the United States Court of Appeals for the Fifth Circuit ("Fifth Circuit") reversed the District Court’s $682.4 million judgment and rendered judgment as a matter of law in favor of the Company and Trinity Highway Products. On January 7, 2019, the United States Supreme Court denied Mr. Harman's petition for certiorari seeking review of the Fifth Circuit's decision. The denial of Mr. Harman's petition ended this action. State, county, and municipal actions Mr. Harman also has separate state qui tam actions currently pending pursuant to: the Virginia Fraud Against Taxpayers Act ( Commonwealth of Virginia ex rel. Joshua M. Harman v. Trinity Industries, Inc. and Trinity Highway Products, LLC , Case No. CL13-698, in the Circuit Court, Richmond, Virginia); the Massachusetts False Claims Act ( Commonwealth of Massachusetts ex rel. Joshua M. Harman Qui Tam v. Trinity Industries, Inc. and Trinity Highway Products, LLC , Case No. 1484-CV-02364, in the Superior Court Department of the Trial Court); and the California False Claims Act ( State of California ex rel. Joshua M. Harman Qui Tam v. Trinity Industries, Inc. and Trinity Highway Products, LLC , Case No. RG 14721864, in the Superior Court of California, Alameda County). In each of these cases, Mr. Harman alleged the Company violated the respective states' false claims act pertaining to sales of the ET Plus, and he is seeking damages, civil penalties, attorneys’ fees, costs and interest. Also, the respective states’ Attorneys General filed Notices of Election to Decline Intervention in all of these matters, with the exception of the Commonwealth of Virginia Attorney General, who intervened in the Virginia matter. Following the United States Supreme Court’s denial of Mr. Harman’s petition for certiorari, the stays have expired or been lifted by court order in all of the above-referenced state qui tam cases except Virginia. The Company believes these state qui tam lawsuits are without merit and intends to vigorously defend all allegations. Other states could take similar or different actions, and could be considering similar state false claims or other litigation against the Company. As previously reported, state qui tam actions filed by Mr. Harman in the states of Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Minnesota, Montana, Nevada, Rhode Island, Tennessee, and New Jersey were dismissed. The Company has been served in a lawsuit filed November 5, 2015, titled Jackson County, Missouri, individually and on behalf of a class of others similarly situated vs. Trinity Industries, Inc. and Trinity Highway Products, LLC , Case No. 1516-CV23684 (Circuit Court of Jackson County, Missouri). The case is being brought by plaintiff for and on behalf of itself and all Missouri counties with a population of 10,000 or more persons, including the City of St. Louis, and the State of Missouri’s transportation authority. The plaintiff alleges that the Company and Trinity Highway Products did not disclose design changes to the ET Plus and these allegedly undisclosed design changes made the ET Plus allegedly defective, unsafe, and unreasonably dangerous. The plaintiff alleges product liability negligence, product liability strict liability, and negligently supplying dangerous instrumentality for supplier’s business purposes. The plaintiff seeks compensatory damages, interest, attorneys' fees and costs, and in the alternative plaintiff seeks a declaratory judgment that the ET Plus is defective, the Company’s conduct was unlawful, and class-wide costs and expenses associated with removing and replacing the ET Plus throughout Missouri. On December 6, 2017, the Court granted plaintiff's Motion for Class Certification, certifying a class of Missouri counties with populations of 10,000 or more persons, including the City of St. Louis and the State of Missouri's transportation authority that have or had ET Plus guardrail end terminals with 4-inch wide guide channels installed on roadways they own or maintain. A trial date has been scheduled in this case for February 22, 2021. The Company believes this lawsuit is without merit and intends to vigorously defend all allegations. While the financial impacts of these state, county, and municipal actions are currently unknown, they could be material. Based on information currently available to the Company and previously disclosed, we currently do not believe that a loss is probable in any one or more of the actions described under "State, county, and municipal actions," therefore no accrual has been included in the accompanying Consolidated Financial Statements. Because of the complexity of these actions as well as the current status of certain of these actions, we are not able to estimate a range of possible losses with respect to any one or more of these actions. Product liability cases The Company is currently defending product liability lawsuits in several different states that are alleged to involve the ET Plus as well as other products manufactured by Trinity Highway Products. These cases are diverse in light of the randomness of collisions in general and the fact that each accident involving a roadside device, such as an end terminal, or any other fixed object along the highway, has its own unique facts and circumstances. The Company carries general liability insurance to mitigate the impact of adverse judgment exposures in these product liability cases. To the extent that the Company believes that a loss is probable with respect to these product liability cases, the accrual for such losses is included in the amounts described below under "Other matters". Other matters The Company is involved in claims and lawsuits incidental to our business arising from various matters, including product warranty, personal injury, environmental issues, workplace laws, and various governmental regulations. The Company evaluates its exposure to such claims and suits periodically and establishes accruals for these contingencies when a range of loss can be reasonably estimated. The range of reasonably possible losses for such matters is $7.9 million to $16.8 million, which includes our rights in indemnity and recourse to third parties of approximately $5.8 million, which is recorded in other assets on our Consolidated Balance Sheet as of September 30, 2020. This range includes any amounts related to the Highway Products litigation matters described above in the section titled “Highway products litigation." At September 30, 2020, total accruals of $10.2 million, including environmental and workplace matters described below, are included in accrued liabilities in the accompanying Consolidated Balance Sheets. The Company believes any additional liability would not be material to its financial position or results of operations. Trinity is subject to remedial orders and federal, state, local, and foreign laws and regulations relating to the environment and the workplace. The Company has reserved $1.1 million to cover our probable and estimable liabilities with respect to the investigations, assessments, and remedial responses to such matters, taking into account currently available information and our contractual rights to indemnification and recourse to third parties. However, estimates of liability arising from future proceedings, assessments, or remediation are inherently imprecise. Accordingly, there can be no assurance that we will not become involved in future litigation or other proceedings involving the environment and the workplace or, if we are found to be responsible or liable in any such litigation or proceeding, that such costs would not be material to the Company. We believe that we are currently in substantial compliance with environmental and workplace laws and regulations.

Summary of Significant Accounti

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Basis of Presentation The foregoing Consolidated Financial Statements are unaudited and have been prepared from the books and records of Trinity Industries, Inc. and its consolidated subsidiaries (“Trinity,” “Company,” “we,” “our,” or "us") including the accounts of our wholly-owned subsidiaries and partially-owned subsidiaries, TRIP Rail Holdings LLC (“TRIP Holdings”) and RIV 2013 Rail Holdings LLC ("RIV 2013"), in which we have a controlling interest. In our opinion, all normal and recurring adjustments necessary for a fair presentation of our financial position as of September 30, 2020, and the results of operations for the three and nine months ended September 30, 2020 and 2019, and cash flows for the nine months ended September 30, 2020 and 2019, have been made in conformity with generally accepted accounting principles. All significant intercompany accounts and transactions have been eliminated. Certain prior year balances have been reclassified to conform to the 2020 presentation. Due to seasonal and other factors, including the impacts of the coronavirus pandemic (“COVID-19”) and the related governmental response, the results of operations for the nine months ended September 30, 2020 may not be indicative of expected results of operations for the year ending December 31, 2020. These interim financial statements and notes are condensed as permitted by the instructions to Form 10-Q and should be read in conjunction with our audited Consolidated Financial Statements included in our Form 10-K for the year ended December 31, 2019.
Revenue [Policy Text Block]	Revenue Recognition Revenue is measured based on the allocation of the transaction price in a contract to satisfied performance obligations. The transaction price does not include any amounts collected on behalf of third parties. We recognize revenue when we satisfy a performance obligation by transferring control over a product or service to a customer. Payments for our products and services are generally due within normal commercial terms. The following is a description of principal activities from which we generate our revenue, separated by reportable segments. See Note 3 for a further discussion regarding our reportable segments. Railcar Leasing and Management Services Group In our Railcar Leasing and Management Services Group ("Leasing Group"), revenue from rentals and operating leases, including contracts that contain non-level fixed lease payments, is recognized monthly on a straight-line basis. Leases not classified as operating leases are generally considered sales-type leases as a result of an option to purchase. We review our operating lease receivables for collectibility on a regular basis, taking into consideration changes in factors such as the lessee’s payment history, the financial condition of the lessee, and business and economic conditions in the industry in which the lessee operates. In the event that the collectibility of a receivable with respect to any lessee is no longer probable, we de-recognize the revenue and related receivable and recognize future revenue only when the lessee makes a rental payment. Contingent rents are recognized when the contingency is resolved. Selling profit or loss associated with sales-type leases is recognized upon lease commencement, and a net investment in the sales-type lease is recorded on the Consolidated Balance Sheet. Interest income related to sales-type leases is recognized over the lease term using the effective interest method. We had no sales-type leases as of September 30, 2020. Revenue is recognized from the sales of railcars from the lease fleet on a gross basis in leasing revenues and cost of revenues if the railcar has been owned for one year or less at the time of sale. Sales of railcars from the lease fleet owned for more than one year are recognized as a net gain or loss from the disposal of a long-term asset. Revenue from servicing and management agreements is recognized as each performance period occurs. We account for shipping and handling costs as activities to fulfill the promise to transfer the goods; as such, these fees are recorded in revenue. The fees and costs of shipping and handling activities are accrued when the related performance obligation has been satisfied. Rail Products Group Our railcar manufacturing business recognizes revenue when the customer has submitted its certificate of acceptance and legal title of the railcar has passed to the customer. Certain contracts for the sales of railcars include price adjustments based on steel-price indices; this amount represents variable consideration for which we are unable to estimate the final consideration until the railcar is delivered. Within our maintenance services business, revenue is recognized over time as repair and maintenance projects are completed, using an input approach based on the costs incurred relative to the total estimated costs of performing the project. We recorded contract assets of $4.9 million and $5.2 million as of September 30, 2020 and December 31, 2019, respectively, related to unbilled revenues recognized on repair and maintenance services that have been performed, but for which the entire project has not yet been completed, and the railcar has not yet been shipped to the customer. These contract assets are included within the Receivables, net of allowance line in our Consolidated Balance Sheets. All Other Our highway products business recognizes revenue when shipment has occurred and legal title of the product has passed to the customer. Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of September 30, 2020 and the percentage of the outstanding performance obligations as of September 30, 2020 expected to be delivered during the remainder of 2020: Unsatisfied performance obligations at September 30, 2020 Total Percent expected to be delivered in 2020 (in millions) Rail Products Group: Products: External Customers $ 725.8 Leasing Group 429.6 $ 1,155.4 19.7 % Maintenance services $ 12.3 17.1 % Railcar Leasing and Management Services Group $ 92.5 5.1 % The remainder of the unsatisfied performance obligations for the Rail Products Group is expected to be delivered through 2023. Unsatisfied performance obligations for the Railcar Leasing and Management Services Group are related to servicing, maintenance, and management agreements and are expected to be performed through 2029.
Lessee, Leases [Policy Text Block]	Lessee We are the lessee of operating leases predominantly for railcars, as well as office buildings, manufacturing equipment, and office equipment. Our operating leases have remaining lease terms ranging from one year to sixteen years, some of which include options to extend for up to five years, and some of which include options to terminate within one year. As of September 30, 2020, we had no material finance leases in which we were the lessee. Certain of our operating leases include lease incentives, which reduce the right-of-use asset and are recognized on a straight-line basis over the lease term. As applicable, the lease liability is also reduced by the amount of lease incentives that have not yet been reimbursed by the lessor. In March 2020, we entered into a lease agreement for a new headquarters facility in Dallas, Texas. The new lease has a contractual term of 16 years from the legal commencement date, which is February 1, 2021. There is an option to extend the lease term; however, we determined that the renewal was not reasonably certain at lease inception. For accounting purposes, the lease commencement date was determined to be in April 2020, which is when we obtained control of the new facility for build-out purposes. The following table summarizes the impact of our operating leases on our Consolidated Financial Statements (in millions, except lease term and discount rate): Three Months Ended Nine Months Ended 2020 2019 2020 2019 Consolidated Statement of Operations Operating lease expense $ 3.7 $ 4.0 $ 12.2 $ 13.3 Short-term lease expense $ 0.7 $ 0.9 $ 2.1 $ 3.5 September 30, 2020 December 31, 2019 Consolidated Balance Sheet Right-of-use assets (1) $ 77.0 $ 44.2 Lease liabilities (2) $ 89.9 $ 44.8 Weighted average remaining lease term 11.2 years 4.8 years Weighted average discount rate 3.4 % 4.1 % Nine Months Ended 2020 2019 Consolidated Statement of Cash Flows Cash flows from operating activities $ 12.2 $ 13.3 Right-of-use assets recognized in exchange for new lease liabilities (3) $ 53.6 $ 8.4 (1) Included in other assets in our Consolidated Balance Sheet. See Note 10 for more information on the impairment of right-of-use assets. (2) Included in other liabilities in our Consolidated Balance Sheet. (3) Includes the commencement of the new headquarters facility described above for the nine months ended September 30, 2020. Future contractual minimum operating lease liabilities will mature as follows (in millions): Leasing Group Non-Leasing Group Total Remaining three months of 2020 $ 2.2 $ 1.1 $ 3.3 2021 8.6 3.5 12.1 2022 7.8 7.4 15.2 2023 6.0 7.5 13.5 2024 2.9 6.3 9.2 Thereafter 1.5 68.5 70.0 Total operating lease payments $ 29.0 $ 94.3 $ 123.3 Less: Present value adjustment (23.7) Less: Lease incentives (9.7) Total operating lease liabilities $ 89.9
Lessor, Leases [Policy Text Block]	Lessor Our Leasing Group enters into railcar operating leases with third parties with terms generally ranging between one year and ten years, although certain leases entered into in prior periods had lease terms of up to twenty years. The majority of our fleet operates on leases that earn fixed monthly lease payments. Generally, lease payments are due at the beginning of the applicable month. A portion of our fleet operates on per diem leases that earn usage-based variable lease payments. Some of our leases include options to extend the leases for up to five years, and a small percentage of our leases include options to terminate within one year with certain notice requirements and early termination penalties. In the second quarter, due to COVID-19, certain of the Leasing Group's customers requested rent relief, primarily in the form of rent payment extensions. In April 2020, the FASB staff issued a question and answer document (the "Lease Modification Q&A") focused on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. The Lease Modification Q&A provides entities with the option to elect to account for lease concessions resulting from COVID-19 as though the enforceable rights and obligations existed in the original lease in certain circumstances. We have elected this practical expedient in our accounting for any eligible lease concessions provided for our leased railcars. To date, these concessions have not had a significant impact on our Consolidated Financial Statements. Leases previously classified as sales-type leases included an option for the lessee to purchase the leased railcars with certain notice. During the three months ended March 31, 2020, the lessee exercised its option to purchase the leased railcars. As of September 30, 2020, non-Leasing Group operating leases were not significant, and we had no sales-type leases and no direct finance leases. We manage risks associated with residual values of leased railcars by investing across a diverse portfolio of railcar types, staggering lease maturities within any given railcar type, avoiding concentration of railcar type and industry, and participating in active secondary markets. Additionally, our lease agreements contain normal wear and tear return condition provisions and high mileage thresholds designed to protect the value of our residual assets. Our lease agreements do not contain any material residual value guarantees or restrictive covenants. The following table summarizes the impact of our leases on our Consolidated Statement of Operations (in millions): Three Months Ended Nine Months Ended 2020 2019 2020 2019 Operating lease revenues $ 169.1 $ 169.5 $ 506.4 $ 506.9 Variable operating lease revenues $ 9.0 $ 12.5 $ 32.2 $ 36.6 Sales-type lease revenues $ — $ 26.3 $ — $ 60.5 Interest income on sales-type lease receivables $ — $ 0.6 $ — $ 0.9 Profit recognized at sales-type lease commencement $ — $ 3.7 $ — $ 7.8 Future contractual minimum revenues for operating leases will mature as follows (in millions) (1) : Remaining three months of 2020 $ 152.0 2021 516.5 2022 406.5 2023 296.9 2024 215.2 Thereafter 391.6 Total $ 1,978.7 (1) Total contractual minimum rental revenues on operating leases relates to our wholly-owned and partially-owned subsidiaries and sub-lease rental revenues associated with the Leasing Group's operating lease obligations.
Cash and Cash Equivalents, Policy [Policy Text Block]	Financial Instruments We consider all highly liquid debt instruments to be either cash and cash equivalents if purchased with a maturity of three months or less, or short-term marketable securities if purchased with a maturity of more than three months and less than one year. Financial instruments that potentially subject us to a concentration of credit risk are primarily cash investments including restricted cash and receivables. We place our cash investments in bank deposits and investment grade, short-term debt instruments and limit the amount of credit exposure to any one commercial issuer. The carrying values of cash, receivables, and accounts payable are considered to be representative of their respective fair values.
Accounting Changes [Text Block]	Property, Plant, and Equipment In early 2020, we finalized an assessment of the estimated useful lives and salvage value assumptions for the railcars in our lease fleet. Based upon analysis of historical fleet data, review of industry standards, and consideration of certain economic factors by railcar type, we determined that it was appropriate to revise the useful lives and salvage values of certain railcar types in our lease fleet. The net impact of these changes, which took effect January 1, 2020, resulted in a change in the weighted average useful life from approximately 34 years to approximately 37 years. This change was accounted for as a change in accounting estimate, which is required to be accounted for on a prospective basis. This change in estimate resulted in a decrease in depreciation expense and a corresponding increase in income from continuing operations of approximately $7.7 million and $23.1 million, as well as an increase in net income of approximately $5.9 million and $17.7 million, for the three and nine months ended September 30, 2020, respectively. Further, earnings per share increased $0.05 for the three months ended September 30, 2020 and increased $0.15 per share for the nine months ended September 30, 2020. See Note 10 for further information regarding impairment of long-lived assets related to our small cube covered hopper railcars recorded in the nine months ended September 30, 2020.
Goodwill Disclosure [Text Block]	Goodwill As of September 30, 2020 and December 31, 2019, the carrying amount of our goodwill totaled $208.8 million, which is primarily attributable to the Rail Products Group.
Product Warranty Disclosure [Text Block]	Warranties We provide various express, limited product warranties that generally range from one year to five years depending on the product. The warranty costs are estimated using a two-step approach. First, an engineering estimate is made for the cost of all claims that have been asserted by customers. Second, based on historical claims experience, a cost is accrued for all products still within a warranty period for which no claims have been filed. We provide for the estimated cost of product warranties at the time revenue is recognized related to products covered by warranties and assess the adequacy of the resulting reserves on a quarterly basis. The changes in the accruals for warranties for the three and nine months ended September 30, 2020 and 2019 are as follows: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (in millions) Beginning balance $ 9.5 $ 8.3 $ 8.1 $ 7.4 Warranty costs incurred (0.3) (1.7) (1.8) (3.2) Warranty originations and revisions 0.3 3.2 3.3 5.8 Warranty expirations (0.3) — (0.4) (0.2) Ending balance $ 9.2 $ 9.8 $ 9.2 $ 9.8
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Recent Accounting Pronouncements Adopted in 2020 ASU 2016-13 — In June 2016, FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments," which amends the impairment model by requiring entities to use a forward-looking approach based on expected losses rather than incurred losses to estimate credit losses on certain types of financial instruments, including trade receivables. This approach may result in the earlier recognition of allowances for losses. In November 2018, the FASB issued ASU No. 2018-19, "Codification Improvements to Topic 326, Financial Instruments—Credit Losses," which excludes operating lease receivables from the scope of ASU 2016-13. ASU 2016-13 is effective for public companies during interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We adopted ASU 2016-13 effective January 1, 2020 using a cumulative-effect adjustment to the opening balance of retained earnings on January 1, 2020. Therefore, comparative financial information was not adjusted. We assessed our outstanding receivables by reportable segment and determined the expected loss rate using historical loss information and aging considerations, as well as the current and future economic conditions of our customer base and the end markets in which they operate. The Leasing Group's outstanding receivables primarily relate to their servicing and management agreements. The method for evaluating the Leasing Group's operating lease receivables remained unchanged by ASU 2016-13. The Rail Products Group's outstanding receivables primarily relate to amounts due on manufactured railcars, as well as completed repairs and maintenance projects. Upon adoption, we recorded an adjustment to opening retained earnings of approximately $0.7 million ($0.5 million, net of tax). The ongoing application of ASU 2016-13 is not expected to materially impact our results of operations, financial position, or cash flows. ASU 2018-15 — In August 2018, the FASB issued ASU No. 2018-15, "Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract," which aligns the accounting for costs incurred to implement a cloud computing arrangement that is a service arrangement with the guidance on capitalizing costs associated with developing or obtaining internal-use software. ASU 2018-15 is effective for public companies during interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We adopted ASU 2018-15 effective January 1, 2020 on a prospective basis. Beginning January 1, 2020, capitalized implementation costs are included within other assets in the Consolidated Balance Sheet and are depreciated within selling, general, and administrative expenses in the Consolidated Statement of Operations. The adoption did not have a significant impact on our Consolidated Financial Statements. ASU 2020-04 — In March 2020, the FASB issued ASU No. 2020-04, "Facilitation of the Effects of Reference Rate Reform on Financial Reporting," which provides temporary optional expedients to accounting guidance on contract modifications and hedge accounting to ease the potential financial reporting burdens as the market transitions from the London Interbank Offered Rate ("LIBOR") to alternative reference rates . ASU 2020-04 was effective upon issuance. ASU 2020-04 is in response to the July 2017 announcement by United Kingdom's Financial Conduct Authority, which regulates the LIBOR, that it will no longer persuade or require banks to submit rates for the calculation of LIBOR after 202 1. We currently have LIBOR-based contracts that extend beyond 2021 including derivative instruments, promissory notes for Trinity Rail Leasing 2017, LLC, a Delaware limited liability company and a limited purpose, indirect wholly-owned subsidiary of the Company owned through Trinity Industries Leasing Company (“TILC”), TILC's warehouse loan facility, and our revolving credit facility. The adoption is not expected to have a significant impact on our Consolidated Financial Statements.

Derivative Instruments and Fa_2

Derivative Instruments and Fair Value Accounting Derivatives (Policies)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	See Note 7 for a description of our debt instruments. Interest Rate Hedges Included in accompanying balance sheet at September 30, 2020 Notional Amount Interest Rate (1) Asset/(Liability) AOCL – loss/(income) Noncontrolling Interest (in millions, except %) Expired hedges: 2018 secured railcar equipment notes $ 249.3 4.41 % $ — $ 0.9 $ — TRIP Holdings warehouse loan $ 788.5 3.60 % $ — $ 1.6 $ 2.1 TRIP Master Funding secured railcar equipment notes $ 34.8 2.62 % $ — $ 0.1 $ 0.1 2017 promissory notes - interest rate cap $ 169.3 3.00 % $ — $ (0.5) $ — Open hedge: 2017 promissory notes - interest rate swap $ 494.6 2.66 % $ (50.0) $ 49.5 $ — (1) Weighted average fixed interest rate, except for the interest rate cap on the 2017 promissory notes. Effect on interest expense-increase/(decrease) Three Months Ended Nine Months Ended Expected effect during next twelve months (1) 2020 2019 2020 2019 (in millions) Expired hedges: 2006 secured railcar equipment notes (2) $ — $ — $ (0.1) $ (0.1) $ — 2018 secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.2 TRIP Holdings warehouse loan $ 0.5 $ 0.5 $ 1.5 $ 1.5 $ 1.6 TRIP Master Funding secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.1 2017 promissory notes - interest rate cap $ (0.1) $ — $ (0.1) $ (0.1) $ (0.1) Open hedge: 2017 promissory notes - interest rate swap $ 3.1 $ 0.6 $ 7.8 $ 1.9 $ 10.9 (1) Based on the fair value of open hedges as of September 30, 2020. (2) Upon settlement of the debt in March 2020, the remaining balance of $0.1 million in AOCL was recognized through interest expense. See Note 7 for additional information on the debt redemption. Other Derivatives Included in accompanying balance sheet at September 30, 2020 Effect on cost of revenues – increase/(decrease) Notional Asset/(Liability) AOCL – Three Months Ended Nine Months Ended Expected effect during next twelve months (1) September 30, 2020 September 30, 2020 (in millions) Foreign currency hedge $ 55.0 $ 2.1 $ (2.3) $ 2.3 $ 4.1 $ (2.3) (1) Based on the fair value of open hedges as of September 30, 2020. Our exposure related to foreign currency and commodity transactions is currently hedged for up to a maximum of twelve months. The effect of commodity hedge transactions was immaterial to the Consolidated Financial Statements for all periods presented herein.

Common Stock and Stock-Based _2

Common Stock and Stock-Based Compensation Stockholders Equity (Policies)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Stockholders' Equity, Policy [Policy Text Block]	Stockholders' Equity In March 2019, our Board of Directors authorized a share repurchase program effective March 7, 2019 through December 31, 2020. The share repurchase program authorized the Company to repurchase up to $350.0 million of its common stock, not to exceed 13.7 million shares. On April 24, 2020, as a result of then-current market conditions, the Board of Directors amended the repurchase program to remove the share limitation. Share repurchase activity under this program is as follows: Shares Repurchased Remaining Authorization to Repurchase Period Number of shares Cost Cost March 7, 2019 Authorization $ 350.0 March 7, 2019 through March 31, 2019 866,715 $ 19.0 $ 331.0 April 1, 2019 through June 30, 2019 2,133,116 44.0 $ 287.0 July 1, 2019 through September 30, 2019 5,171,489 100.9 $ 186.1 October 1, 2019 through December 31, 2019 2,933,474 60.8 $ 125.3 January 1, 2020 through March 31, 2020 1,850,000 35.4 $ 89.9 April 1, 2020 through June 30, 2020 — — $ 89.9 July 1, 2020 through September 30, 2020 4,466,896 89.9 $ — Total 17,421,690 $ 350.0 In the third quarter of 2020, we completed the existing share repurchase program. Certain shares of stock repurchased during September 2020, totaling $4.9 million, were cash settled in October 2020 in accordance with normal settlement practices. In addition to the amounts reported in the table above, share repurchases for the nine months ended September 30, 2019 included 2.6 million shares at a cost of approximately $70.0 million representing the final settlement of an accelerated share repurchase program, which was funded in November 2018 but a portion of which remained outstanding as of December 31, 2018. Subsequent event — In October 2020, our Board of Directors authorized a new share repurchase program effective October 23, 2020 through December 31, 2021. The new share repurchase program authorizes the Company to repurchase up to $250.0 million of its common stock.
Share-based Payment Arrangement [Text Block]	Stock-Based Compensation Stock-based compensation totaled approximately $4.8 million and $19.7 million for the three and nine months ended September 30, 2020, respectively. Stock-based compensation totaled approximately $8.4 million and $21.4 million for the three and nine months ended September 30, 2019, respectively. The Company's annual grant of share-based awards generally occurs in the second quarter under our 2004 Fourth Amended and Restated Stock Option and Incentive Plan (the "Plan”). Our stock options have contractual terms of ten years. Expense related to stock options issued to eligible employees under the Plan is recognized over their vesting period on a straight-line basis, generally three years. Expense related to restricted stock units ("RSUs") issued to eligible employees under the Plan is recognized ratably over the vesting period, generally between three years and four years. Certain RSU grants made in 2020 provide for full vesting when the award recipients reach 60 years of age and have provided at least 10 years of service to the Company, provided that the awards remain outstanding for a period of six months from the date of grant. The expense for these awards is recognized over the applicable service period for each of the eligible award recipients. Expense related to performance units is recognized ratably from their award date to the end of the performance period, generally three years. Expense related to restricted stock awards ("RSAs") and RSUs granted to non-employee directors under the Plan is recognized ratably over the vesting period, generally one year. The following table summarizes stock-based compensation awards granted during the nine months ended September 30, 2020: Number of Shares Granted Weighted Average Grant-Date Fair Value per Award Stock options 300,000 $ 5.26 Restricted stock units 988,309 $ 18.59 Restricted stock awards 20,939 $ 18.51 Performance units 444,252 $ 20.31 The fair value of the stock options granted was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions: Nine Months Ended September 30, 2020 Exercise price $ 21.61 Risk-free interest rate 1.48 % Expected life (in years) 6.50 Equity volatility 35.00 % Dividend yield 3.42 %

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Remaining Performance Obligation	The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of September 30, 2020 and the percentage of the outstanding performance obligations as of September 30, 2020 expected to be delivered during the remainder of 2020: Unsatisfied performance obligations at September 30, 2020 Total Percent expected to be delivered in 2020 (in millions) Rail Products Group: Products: External Customers $ 725.8 Leasing Group 429.6 $ 1,155.4 19.7 % Maintenance services $ 12.3 17.1 % Railcar Leasing and Management Services Group $ 92.5 5.1 %
Lessee, Operating Lease, Disclosure [Table Text Block]	The following table summarizes the impact of our operating leases on our Consolidated Financial Statements (in millions, except lease term and discount rate): Three Months Ended Nine Months Ended 2020 2019 2020 2019 Consolidated Statement of Operations Operating lease expense $ 3.7 $ 4.0 $ 12.2 $ 13.3 Short-term lease expense $ 0.7 $ 0.9 $ 2.1 $ 3.5 September 30, 2020 December 31, 2019 Consolidated Balance Sheet Right-of-use assets (1) $ 77.0 $ 44.2 Lease liabilities (2) $ 89.9 $ 44.8 Weighted average remaining lease term 11.2 years 4.8 years Weighted average discount rate 3.4 % 4.1 % Nine Months Ended 2020 2019 Consolidated Statement of Cash Flows Cash flows from operating activities $ 12.2 $ 13.3 Right-of-use assets recognized in exchange for new lease liabilities (3) $ 53.6 $ 8.4 (1) Included in other assets in our Consolidated Balance Sheet. See Note 10 for more information on the impairment of right-of-use assets. (2) Included in other liabilities in our Consolidated Balance Sheet. (3) Includes the commencement of the new headquarters facility described above for the nine months ended September 30, 2020.
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Future contractual minimum operating lease liabilities will mature as follows (in millions): Leasing Group Non-Leasing Group Total Remaining three months of 2020 $ 2.2 $ 1.1 $ 3.3 2021 8.6 3.5 12.1 2022 7.8 7.4 15.2 2023 6.0 7.5 13.5 2024 2.9 6.3 9.2 Thereafter 1.5 68.5 70.0 Total operating lease payments $ 29.0 $ 94.3 $ 123.3 Less: Present value adjustment (23.7) Less: Lease incentives (9.7) Total operating lease liabilities $ 89.9
Leases of Lessor Disclosure [Text Block]	The following table summarizes the impact of our leases on our Consolidated Statement of Operations (in millions): Three Months Ended Nine Months Ended 2020 2019 2020 2019 Operating lease revenues $ 169.1 $ 169.5 $ 506.4 $ 506.9 Variable operating lease revenues $ 9.0 $ 12.5 $ 32.2 $ 36.6 Sales-type lease revenues $ — $ 26.3 $ — $ 60.5 Interest income on sales-type lease receivables $ — $ 0.6 $ — $ 0.9 Profit recognized at sales-type lease commencement $ — $ 3.7 $ — $ 7.8
Lessor, Payments to be Received, Maturity [Table Text Block]	Future contractual minimum revenues for operating leases will mature as follows (in millions) (1) : Remaining three months of 2020 $ 152.0 2021 516.5 2022 406.5 2023 296.9 2024 215.2 Thereafter 391.6 Total $ 1,978.7 (1) Total contractual minimum rental revenues on operating leases relates to our wholly-owned and partially-owned subsidiaries and sub-lease rental revenues associated with the Leasing Group's operating lease obligations.
Schedule of Product Warranty Liability [Table Text Block]	The changes in the accruals for warranties for the three and nine months ended September 30, 2020 and 2019 are as follows: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (in millions) Beginning balance $ 9.5 $ 8.3 $ 8.1 $ 7.4 Warranty costs incurred (0.3) (1.7) (1.8) (3.2) Warranty originations and revisions 0.3 3.2 3.3 5.8 Warranty expirations (0.3) — (0.4) (0.2) Ending balance $ 9.2 $ 9.8 $ 9.2 $ 9.8

Derivative Instruments and Fa_3

Derivative Instruments and Fair Value Accounting Derivatives and Hedging (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives [Table Text Block]	Included in accompanying balance sheet at September 30, 2020 Notional Amount Interest Rate (1) Asset/(Liability) AOCL – loss/(income) Noncontrolling Interest (in millions, except %) Expired hedges: 2018 secured railcar equipment notes $ 249.3 4.41 % $ — $ 0.9 $ — TRIP Holdings warehouse loan $ 788.5 3.60 % $ — $ 1.6 $ 2.1 TRIP Master Funding secured railcar equipment notes $ 34.8 2.62 % $ — $ 0.1 $ 0.1 2017 promissory notes - interest rate cap $ 169.3 3.00 % $ — $ (0.5) $ — Open hedge: 2017 promissory notes - interest rate swap $ 494.6 2.66 % $ (50.0) $ 49.5 $ — (1) Weighted average fixed interest rate, except for the interest rate cap on the 2017 promissory notes.
Derivative Instruments, Gain (Loss)	Effect on interest expense-increase/(decrease) Three Months Ended Nine Months Ended Expected effect during next twelve months (1) 2020 2019 2020 2019 (in millions) Expired hedges: 2006 secured railcar equipment notes (2) $ — $ — $ (0.1) $ (0.1) $ — 2018 secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.2 TRIP Holdings warehouse loan $ 0.5 $ 0.5 $ 1.5 $ 1.5 $ 1.6 TRIP Master Funding secured railcar equipment notes $ 0.1 $ 0.1 $ 0.2 $ 0.2 $ 0.1 2017 promissory notes - interest rate cap $ (0.1) $ — $ (0.1) $ (0.1) $ (0.1) Open hedge: 2017 promissory notes - interest rate swap $ 3.1 $ 0.6 $ 7.8 $ 1.9 $ 10.9 (1) Based on the fair value of open hedges as of September 30, 2020. (2) Upon settlement of the debt in March 2020, the remaining balance of $0.1 million in AOCL was recognized through interest expense. See Note 7 for additional information on the debt redemption. Other Derivatives Included in accompanying balance sheet at September 30, 2020 Effect on cost of revenues – increase/(decrease) Notional Asset/(Liability) AOCL – Three Months Ended Nine Months Ended Expected effect during next twelve months (1) September 30, 2020 September 30, 2020 (in millions) Foreign currency hedge $ 55.0 $ 2.1 $ (2.3) $ 2.3 $ 4.1 $ (2.3) (1) Based on the fair value of open hedges as of September 30, 2020.

Derivative Instruments and Fa_4

Derivative Instruments and Fair Value Accounting Fair Value Tables (Tables)	9 Months Ended
	Sep. 30, 2020
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The assets measured as Level 1 in the fair value hierarchy are summarized below: Level 1 September 30, 2020 December 31, 2019 (in millions) Assets: Cash equivalents $ 24.2 $ 57.9 Restricted cash 101.1 111.4 Total assets $ 125.3 $ 169.3
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The assets and liabilities measured as Level 2 in the fair value hierarchy are summarized below: Level 2 September 30, 2020 December 31, 2019 (in millions) Assets: Foreign currency hedge (1) $ 2.1 $ 1.2 Total assets $ 2.1 $ 1.2 Liabilities: Interest rate hedge (2) $ 50.0 $ 28.0 Total liabilities $ 50.0 $ 28.0 (1) Included in other assets in our Consolidated Balance Sheets. (2) Included in accrued liabilities in our Consolidated Balance Sheets.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended Nine Months Ended September 30, 2020 2019 2020 2019 (in millions) Operating profit (loss): Railcar Leasing and Management Services Group $ 89.7 $ 115.7 $ 265.5 $ 306.3 Rail Products Group 3.2 65.4 36.2 180.8 All Other 7.3 3.9 23.9 19.9 Segment Totals before Eliminations, Corporate Expenses, Impairment of long-lived assets, and Restructuring activities 100.2 185.0 325.6 507.0 Corporate (21.0) (23.9) (73.3) (78.1) Impairment of long-lived assets — — (369.4) — Restructuring activities, net (4.7) — (10.5) — Eliminations – Lease Subsidiary (2.6) (40.7) (33.5) (109.5) Eliminations – Other 1.0 (0.1) (0.3) (0.3) Consolidated operating profit (loss) $ 72.9 $ 120.3 $ (161.4) $ 319.1 Other (income) expense 53.7 54.0 164.1 161.0 Provision (benefit) for income taxes (6.7) 18.2 (226.1) 41.2 Loss from discontinued operations, net of income taxes — (0.4) (0.2) (2.3) Net income (loss) $ 25.9 $ 47.7 $ (99.6) $ 114.6

Railcar Leasing and Managemen_2

Railcar Leasing and Management Services Group (Tables)	9 Months Ended
	Sep. 30, 2020
Sale Leaseback Transaction [Line Items]
Selected consolidating financial information for the Leasing Group	Selected consolidated financial information for the Leasing Group is as follows: September 30, 2020 Wholly- Partially-Owned Subsidiaries Total Leasing Group Eliminations — Lease Subsidiary (1) Adjusted Total Leasing Group (in millions) Cash and cash equivalents $ 2.5 $ — $ 2.5 $ — $ 2.5 Accounts receivable 81.3 9.2 90.5 — 90.5 Property, plant, and equipment, net (2) 5,692.5 1,637.8 7,330.3 (826.8) 6,503.5 Restricted cash 73.0 28.1 101.1 — 101.1 Other assets 38.1 1.2 39.3 — 39.3 Total assets $ 5,887.4 $ 1,676.3 $ 7,563.7 $ (826.8) $ 6,736.9 Accounts payable and accrued liabilities $ 148.6 $ 30.4 $ 179.0 $ — $ 179.0 Debt, net 3,172.7 1,239.3 4,412.0 — 4,412.0 Deferred income taxes 925.3 1.2 926.5 (193.8) 732.7 Other liabilities 26.9 — 26.9 — 26.9 Total liabilities 4,273.5 1,270.9 5,544.4 (193.8) 5,350.6 Noncontrolling interest — 276.3 276.3 — 276.3 Total Equity $ 1,613.9 $ 129.1 $ 1,743.0 $ (633.0) $ 1,110.0 December 31, 2019 Wholly- Partially-Owned Subsidiaries Total Leasing Group Eliminations — Lease Subsidiary (1) Adjusted Total Leasing Group (in millions) Cash and cash equivalents $ 1.8 $ — $ 1.8 $ — $ 1.8 Accounts receivable 73.9 8.7 82.6 — 82.6 Property, plant, and equipment, net 5,818.9 1,786.7 7,605.6 (903.8) 6,701.8 Restricted cash 78.4 33.0 111.4 — 111.4 Other assets 209.8 1.4 211.2 — 211.2 Total assets $ 6,182.8 $ 1,829.8 $ 8,012.6 $ (903.8) $ 7,108.8 Accounts payable and accrued liabilities $ 100.7 $ 44.6 $ 145.3 $ — $ 145.3 Debt, net 3,080.7 1,278.4 4,359.1 — 4,359.1 Deferred income taxes 861.7 1.1 862.8 (184.8) 678.0 Other liabilities 32.7 — 32.7 — 32.7 Total liabilities 4,075.8 1,324.1 5,399.9 (184.8) 5,215.1 Noncontrolling interest — 348.8 348.8 — 348.8 Total Equity $ 2,107.0 $ 156.9 $ 2,263.9 $ (719.0) $ 1,544.9 (1) Net deferred profit on railcars sold to the Leasing Group consists of intersegment profit that is eliminated in consolidation. Net deferred profit and the related deferred tax impact are included as adjustments to the property, plant, and equipment, net and deferred income taxes line items, respectively, in the Eliminations – Lease Subsidiary column above to reflect the net book value of the railcars purchased by the Leasing Group from the Rail Products Group based on manufacturing cost. See Note 4 and Note 7 for a further discussion regarding our investment in our partially-owned leasing subsidiaries and the related indebtedness. (2) See Note 10 for further information regarding impairment of long-lived assets recorded in the nine months ended September 30, 2020.
Selected consolidating income statement information for the Leasing Group	Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 Percent 2020 2019 Percent ($ in millions) Change ($ in millions) Change Revenues: Leasing and management $ 183.9 $ 190.1 (3.3) % $ 558.6 $ 566.6 (1.4) % Sales of railcars owned one year or less at the time of sale (1) — 136.3 (100.0) % 54.4 237.3 (77.1) % Total revenues $ 183.9 $ 326.4 (43.7) % $ 613.0 $ 803.9 (23.7) % Operating profit (2) : Leasing and management $ 86.8 $ 79.8 8.8 % $ 247.8 $ 234.6 5.6 % Railcar sales: Railcars owned one year or less at the time of sale — 17.8 (100.0) % 0.4 27.0 (98.5) % Railcars owned more than one year at the time of sale 2.9 18.1 (84.0) % 17.3 44.7 (61.3) % Total operating profit $ 89.7 $ 115.7 (22.5) % $ 265.5 $ 306.3 (13.3) % Total operating profit margin 48.8 % 35.4 % 43.3 % 38.1 % Leasing and management operating profit margin 47.2 % 42.0 % 44.4 % 41.4 % Selected expense information: Depreciation (3)(4) $ 51.5 $ 59.4 (13.3) % $ 159.1 $ 171.6 (7.3) % Maintenance and compliance $ 18.5 $ 24.9 (25.7) % $ 67.4 $ 79.2 (14.9) % Rent $ 2.1 $ 3.8 (44.7) % $ 8.1 $ 13.6 (40.4) % Selling, engineering, and administrative expenses $ 11.7 $ 10.7 9.3 % $ 39.0 $ 36.2 7.7 % Interest $ 47.0 $ 50.0 (6.0) % $ 149.2 $ 146.4 1.9 % (1) Includes revenues associated with sales-type leases of $26.3 million and $60.5 million for the three and nine months ended September 30, 2019, respectively. (2) Operating profit includes: depreciation; maintenance and compliance; rent; and selling, engineering, and administrative expenses. Amortization of deferred profit on railcars sold from the Rail Products Group to the Leasing Group is included in the operating profit of the Leasing Group, resulting in the recognition of depreciation expense based on our original manufacturing cost of the railcars. Interest expense is not a component of operating profit and includes the effect of hedges. (3) Effective January 1, 2020, we revised the estimated useful lives and salvage values of certain railcar types in our lease fleet. This change in estimate resulted in a decrease in depreciation expense in the three and nine months ended September 30, 2020 of approximately $7.7 million and $23.1 million, respectively. This decrease was partially offset by higher depreciation associated with growth in the lease fleet. See Note 1 of the Consolidated Financial Statements for further information. (4) As a result of the impairment of long-lived assets related to our small cube covered hopper railcars recorded in the second quarter of 2020, our quarterly depreciation expense beginning in the third quarter of 2020 has decreased by approximately $3.5 million.
Schedule of proceeds from leased railcars	During the three and nine months ended September 30, 2020 and 2019, information related to the sales of leased railcars is as follows: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (in millions) Sales of leased railcars: Railcars owned one year or less at the time of sale (1) $ — $ 136.3 $ 54.4 $ 237.3 Railcars owned more than one year at the time of sale 6.5 75.1 138.7 175.0 $ 6.5 $ 211.4 $ 193.1 $ 412.3 Operating profit on sales of leased railcars: Railcars owned one year or less at the time of sale $ — $ 17.8 $ 0.4 $ 27.0 Railcars owned more than one year at the time of sale 2.9 18.1 17.3 44.7 $ 2.9 $ 35.9 $ 17.7 $ 71.7 Operating profit margin on sales of leased railcars: Railcars owned one year or less at the time of sale — % 13.1 % 0.7 % 11.4 % Railcars owned more than one year at the time of sale 44.6 % 24.1 % 12.5 % 25.5 % Weighted average operating profit margin on sales of leased railcars 44.6 % 17.0 % 9.2 % 17.4 % (1) Includes revenues associated with sales-type leases of $26.3 million and $60.5 million for the three and nine months ended September 30, 2019, respectively.
Future contractual minimum rental revenues on leases	Future contractual minimum rental revenues on operating leases related to our wholly-owned and partially-owned subsidiaries are as follows: Remaining three months of 2020 2021 2022 2023 2024 Thereafter Total (in millions) Future contractual minimum rental revenues $ 150.3 $ 511.2 $ 402.8 $ 295.2 $ 214.5 $ 391.5 $ 1,965.5
Operating leases
Sale Leaseback Transaction [Line Items]
Future operating lease obligations and future contractual minimum rental revenues	Future amounts due as well as future contractual minimum rental revenues related to the Leasing Group's railcar operating lease obligations are as follows: Remaining three months of 2020 2021 2022 2023 2024 Thereafter Total (in millions) Future operating lease obligations $ 2.1 $ 8.2 $ 7.5 $ 5.7 $ 2.5 $ 0.9 $ 26.9 Future contractual minimum rental revenues $ 1.7 $ 5.3 $ 3.7 $ 1.7 $ 0.7 $ 0.1 $ 13.2

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	9 Months Ended
	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	The following table summarizes the components of property, plant, and equipment: September 30, 2020 December 31, 2019 (in millions) Manufacturing/Corporate: Land $ 28.6 $ 28.4 Buildings and improvements 416.2 402.2 Machinery and other 556.3 546.7 Construction in progress 88.4 63.1 1,089.5 1,040.4 Less: accumulated depreciation (655.1) (631.6) 434.4 408.8 Leasing: Wholly-owned subsidiaries: Machinery and other 13.9 13.7 Equipment on lease 6,868.7 6,944.2 6,882.6 6,957.9 Less: accumulated depreciation (1,190.1) (1,139.0) 5,692.5 5,818.9 Partially-owned subsidiaries: Equipment on lease 2,245.6 2,410.0 Less: accumulated depreciation (607.8) (623.3) 1,637.8 1,786.7 Deferred profit on railcars sold to the Leasing Group (1,063.8) (1,135.8) Less: accumulated amortization 237.0 232.0 (826.8) (903.8) $ 6,937.9 $ 7,110.6

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Components of debt	The carrying amounts of our long-term debt are as follows: September 30, 2020 December 31, 2019 (in millions) Corporate – Recourse: Revolving credit facility $ 125.0 $ 125.0 Senior notes, net of unamortized discount of $0.2 and $0.2 399.8 399.8 524.8 524.8 Less: unamortized debt issuance costs (1.7) (2.0) Total recourse debt 523.1 522.8 Leasing – Non-recourse: Wholly-owned subsidiaries: Secured railcar equipment notes, net of unamortized discount of $1.1 and $2.0 1,948.8 2,124.1 2017 promissory notes, net of unamortized discount of $10.7 and $— 813.7 627.1 TILC warehouse facility 430.5 353.4 3,193.0 3,104.6 Less: unamortized debt issuance costs (20.3) (23.9) 3,172.7 3,080.7 Partially-owned subsidiaries: Secured railcar equipment notes 1,248.9 1,289.3 Less: unamortized debt issuance costs (9.6) (10.9) 1,239.3 1,278.4 Total non–recourse debt 4,412.0 4,359.1 Total debt $ 4,935.1 $ 4,881.9 September 30, 2020 December 31, 2019 (in millions) Level 1 $ 1,369.2 $ 1,105.5 Level 2 407.4 411.7 Level 3 3,384.7 3,547.4 $ 5,161.3 $ 5,064.6

Employee Retirement Plans (Tabl

Employee Retirement Plans (Tables)	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Schedule of Costs of Retirement Plans [Table Text Block]	The following table summarizes the components of our net retirement cost: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (in millions) Expense Components Service cost $ — $ — $ — $ 0.1 Interest 3.8 5.0 11.2 14.8 Expected return on plan assets (5.3) (5.8) (15.7) (17.3) Amortization of actuarial loss 1.5 1.2 4.5 3.4 Amortization of prior service cost 0.3 — 0.9 — Net periodic benefit cost 0.3 0.4 0.9 1.0 Profit sharing 1.9 3.1 6.5 8.3 Net expense $ 2.2 $ 3.5 $ 7.4 $ 9.3

Restructuring Activities (Table

Restructuring Activities (Tables)	9 Months Ended
	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table sets forth the restructuring activity and balance of the restructuring liability, which is included in other liabilities in our Consolidated Balance Sheet: Accrued charges as of December 31, 2019 Charges and adjustments Payments Accrued charges as of September 30, 2020 (in millions) Cash charges: Employee severance costs $ 3.4 $ 7.5 $ (8.8) $ 2.1 Contract termination costs — 0.6 — 0.6 $ 3.4 $ 8.1 $ (8.8) $ 2.7 Asset impairment charges: Write-down of assets $ 5.9 Gain on disposition of assets (3.5) $ 2.4 Total restructuring activities $ 10.5
Restructuring and Related Costs [Table Text Block]	Although restructuring activities are not allocated to our reportable segments, the following table summarizes the restructuring activities by reportable segment: Three Months Ended September 30, 2020 Employee Severance Costs Contract Termination Costs Write-down of Assets Total (in millions) Railcar Leasing and Management Services Group $ 1.4 $ — $ — $ 1.4 Rail Products Group 1.3 0.2 0.7 2.2 All Other 0.1 — — 0.1 Corporate 0.6 0.4 — 1.0 Total restructuring activities $ 3.4 $ 0.6 $ 0.7 $ 4.7 Nine Months Ended September 30, 2020 Employee Severance Costs Contract Termination Costs Gain on Disposition of Assets Write-down of Assets Total (in millions) Railcar Leasing and Management Services Group $ 1.4 $ — $ — $ — $ 1.4 Rail Products Group 3.9 0.2 — 0.7 4.8 All Other 0.2 — (3.5) — (3.3) Corporate 2.0 0.4 — 5.2 7.6 Total restructuring activities $ 7.5 $ 0.6 $ (3.5) $ 5.9 $ 10.5

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Changes in AOCL for the nine months ended September 30, 2020 are as follows: Currency translation adjustments Unrealized gain/(loss) on derivative financial instruments Net actuarial gains/(losses) and prior service costs of defined benefit plans Accumulated Other Comprehensive Loss (in millions) Balances at December 31, 2019 $ (1.3) $ (17.9) $ (133.9) $ (153.1) Other comprehensive loss, net of tax, before reclassifications — (25.3) — (25.3) Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $—, $3.0, $1.2, and $4.2 — 10.6 4.2 14.8 Less: noncontrolling interest — (0.9) — (0.9) Other comprehensive income (loss) — (15.6) 4.2 (11.4) Balances at September 30, 2020 $ (1.3) $ (33.5) $ (129.7) $ (164.5)

Common Stock and Stock-Based _3

Common Stock and Stock-Based Compensation Stock Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Activity [Table Text Block]	The following table summarizes stock-based compensation awards granted during the nine months ended September 30, 2020: Number of Shares Granted Weighted Average Grant-Date Fair Value per Award Stock options 300,000 $ 5.26 Restricted stock units 988,309 $ 18.59 Restricted stock awards 20,939 $ 18.51 Performance units 444,252 $ 20.31 The fair value of the stock options granted was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions: Nine Months Ended September 30, 2020 Exercise price $ 21.61 Risk-free interest rate 1.48 % Expected life (in years) 6.50 Equity volatility 35.00 % Dividend yield 3.42 %

Common Stock and Stock-Based _4

Common Stock and Stock-Based Compensation Share Repurchases (Tables)	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Share Repurchases [Table Text Block]	Share repurchase activity under this program is as follows: Shares Repurchased Remaining Authorization to Repurchase Period Number of shares Cost Cost March 7, 2019 Authorization $ 350.0 March 7, 2019 through March 31, 2019 866,715 $ 19.0 $ 331.0 April 1, 2019 through June 30, 2019 2,133,116 44.0 $ 287.0 July 1, 2019 through September 30, 2019 5,171,489 100.9 $ 186.1 October 1, 2019 through December 31, 2019 2,933,474 60.8 $ 125.3 January 1, 2020 through March 31, 2020 1,850,000 35.4 $ 89.9 April 1, 2020 through June 30, 2020 — — $ 89.9 July 1, 2020 through September 30, 2020 4,466,896 89.9 $ — Total 17,421,690 $ 350.0

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Computation of basic and diluted net income attributable to Trinity Industries, Inc.	The computation of basic and diluted net income attributable to Trinity Industries, Inc. is as follows. Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (in millions, except per share amounts) Income (loss) from continuing operations $ 25.9 $ 48.1 $ (99.4) $ 116.9 Less: Net (income) loss attributable to noncontrolling interest (0.8) 1.3 79.5 1.4 Unvested restricted share participation — continuing operations (0.2) (0.6) — (1.6) Net income (loss) from continuing operations attributable to Trinity Industries, Inc. 24.9 48.8 (19.9) 116.7 Net loss from discontinued operations, net of income taxes — (0.4) (0.2) (2.3) Unvested restricted share participation — discontinued operations — — — — Net loss from discontinued operations attributable to Trinity Industries, Inc. — (0.4) (0.2) (2.3) Net income (loss) attributable to Trinity Industries, Inc., including the effect of unvested restricted share participation $ 24.9 $ 48.4 $ (20.1) $ 114.4 Basic weighted average shares outstanding 116.4 124.7 117.2 127.6 Effect of dilutive securities: Nonparticipating unvested RSUs and RSAs 0.6 1.3 — 1.6 Diluted weighted average shares outstanding 117.0 126.0 117.2 129.2 Basic earnings per common share: Income (loss) from continuing operations $ 0.21 $ 0.39 $ (0.17) $ 0.91 Income (loss) from discontinued operations — — — (0.02) Basic net income (loss) attributable to Trinity Industries, Inc. $ 0.21 $ 0.39 $ (0.17) $ 0.89 Diluted earnings per common share: Income (loss) from continuing operations $ 0.21 $ 0.39 $ (0.17) $ 0.90 Income (loss) from discontinued operations — — — (0.02) Diluted net income (loss) attributable to Trinity Industries, Inc. $ 0.21 $ 0.39 $ (0.17) $ 0.88

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Revenue Recognition and Remaining performance obligation (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Asset, Not Past Due	$ 4.9	$ 5.2
Rail Products Group [Member] | Railcar products [Domain]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1,155.4
Revenue, remaining performance obligation expected to be delivered in current year	19.70%
Rail Products Group [Member] | Railcar products [Domain] | External Customers
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 725.8
Rail Products Group [Member] | Railcar products [Domain] | Leasing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	429.6
Rail Products Group [Member] | Maintenance services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 12.3
Revenue, remaining performance obligation expected to be delivered in current year	17.10%
Railcar Leasing and Management Services Group [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 92.5
Revenue, remaining performance obligation expected to be delivered in current year	5.10%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies Lessee Accounting (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term		5 years		5 years
Lessee, Operating Lease, Termination Option Term				one year
Finance Lease, Principal Payments				$ 0
Operating lease expense		$ 3.7	$ 4	12.2	$ 13.3
Short-term lease expense		0.7	$ 0.9	2.1	3.5
Right-of-use assets (1)	[1]	77		77		$ 44.2
Lease liabilities (2)	[2]	$ 89.9		$ 89.9		$ 44.8
Weighted average remaining lease term		11 years 2 months 12 days		11 years 2 months 12 days		4 years 9 months 18 days
Weighted average discount rate		3.40%		3.40%		4.10%
Cash flows from operating activities				$ 12.2	13.3
Right-of-use assets recognized in exchange for new lease liabilities (3)	[3]			53.6	$ 8.4
Remaining three months of 2020		$ 3.3		3.3
2021		12.1		12.1
2022		15.2		15.2
2023		13.5		13.5
2024		9.2		9.2
Thereafter		70		70
Total operating lease payments		123.3		123.3
Less: Present value adjustment		(23.7)		(23.7)
Less: Lease incentives		$ (9.7)		$ (9.7)
Minimum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		16 years		16 years
Railcar Leasing and Management Services Group [Member]
Lessee, Lease, Description [Line Items]
Remaining three months of 2020		$ 2.2		$ 2.2
2021		8.6		8.6
2022		7.8		7.8
2023		6		6
2024		2.9		2.9
Thereafter		1.5		1.5
Total operating lease payments		29		29
Consolidated Subsidiaries, Excluding Leasing [Member]
Lessee, Lease, Description [Line Items]
Remaining three months of 2020		1.1		1.1
2021		3.5		3.5
2022		7.4		7.4
2023		7.5		7.5
2024		6.3		6.3
Thereafter		68.5		68.5
Total operating lease payments		$ 94.3		$ 94.3
[1]	(Mark One)
[2]	(Mark One)
[3]	(Mark One)

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Lessor Accounting (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2018
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Renewal Term		5 years		5 years
Lessor, Operating Lease, Termination Option Term				one year
Direct Financing Lease, Revenue		$ 0		$ 0
Operating lease revenues		169.1	$ 169.5	506.4	$ 506.9
Variable operating lease revenues		9	12.5	32.2	36.6
Sales-type lease revenues		0	26.3	0	60.5
Interest income on sales-type lease receivables		0	0.6	0	0.9
Profit recognized at sales-type lease commencement		0	$ 3.7	0	$ 7.8
Railcar Leasing and Management Services Group [Member]
Lessor, Lease, Description [Line Items]
Remaining three months of 2020	[1]	152		152
2021	[1]	516.5		516.5
2022	[1]	406.5		406.5
2023	[1]	296.9		296.9
2024	[1]	215.2		215.2
Thereafter	[1]	391.6		391.6
Total	[1]	$ 1,978.7		$ 1,978.7
Minimum | Railcar Leasing and Management Services Group [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Term of Contract		1 year		1 year
Maximum | Railcar Leasing and Management Services Group [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Term of Contract		10 years		10 years		20 years
[1]	Total contractual minimum rental revenues on operating leases relates to our wholly-owned and partially-owned subsidiaries and sub-lease rental revenues associated with the Leasing Group's operating lease obligations.

Summary of Significant Accoun_6

Summary of Significant Accounting Policies Receivables (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Credit Loss [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)	$ 2.8
Accounts Receivable, Allowance for Credit Loss, Writeoff	0.9
Accounts Receivable, Allowance for Credit Loss	$ 8.3

Summary of Significant Accoun_7

Summary of Significant Accounting Policies Property, Plant, and Equipment (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Change in Accounting Estimate [Line Items]
Depreciation and amortization			$ 199.5	$ 210.5
Basic net income (loss) attributable to Trinity Industries, Inc.	$ 0.21	$ 0.39	$ (0.17)	$ 0.89
Diluted net income (loss) attributable to Trinity Industries, Inc.	$ 0.21	$ 0.39	$ (0.17)	$ 0.88
Service Life [Member]
Change in Accounting Estimate [Line Items]
Depreciation and amortization	$ 7.7		$ 23.1
Depreciation, Amortization and Accretion, Net	$ 5.9		$ 17.7
Basic net income (loss) attributable to Trinity Industries, Inc.	$ 0.05		$ 0.15
Diluted net income (loss) attributable to Trinity Industries, Inc.	$ 0.05		$ 0.15

Summary of Significant Accoun_8

Summary of Significant Accounting Policies Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 208.8	$ 208.8

Summary of Significant Accoun_9

Summary of Significant Accounting Policies Warranties (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Product Warranty Liability [Line Items]
Standard Product Warranty Accrual	$ 9.2	$ 9.8	$ 9.2	$ 9.8	$ 9.5	$ 8.1	$ 8.3	$ 7.4
Warranty costs incurred	(0.3)	(1.7)	(1.8)	(3.2)
Warranty originations and revisions	0.3	3.2	3.3	5.8
Warranty expirations	$ (0.3)	$ 0	$ (0.4)	$ (0.2)
Minimum
Product Warranty Liability [Line Items]
Product Warranty Period			1 year
Maximum
Product Warranty Liability [Line Items]
Product Warranty Period			5 years

Derivative Instruments and Fa_5

Derivative Instruments and Fair Value Accounting Derivative Instruments (Details) - USD ($) $ in Millions		Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 2,093.6	$ 2,160.4	$ 2,466.1	$ 2,378.9	$ 2,459.3	$ 2,529.6	$ 2,565.1	$ 2,562
Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Domain]
Derivative [Line Items]
Derivative, Notional Amount		$ 249.3
Derivative, Average Fixed Interest Rate	[1]	4.41%
Derivative Liability		$ 0
Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 788.5
Derivative, Average Fixed Interest Rate	[1]	3.60%
Derivative Liability		$ 0
Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Master Funding Secured Railcar Equipment Notes [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 34.8
Derivative, Average Fixed Interest Rate	[1]	2.62%
Derivative Liability		$ 0
Designated as Hedging Instrument [Member] | Interest Rate Cap [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 169.3
Derivative, Cap Interest Rate	[1]	3.00%
Derivative Liability		$ 0
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 494.6
Derivative, Average Fixed Interest Rate		2.66%
Derivative Liability		$ (50)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Domain]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0.9
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		1.6
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Master Funding Secured Railcar Equipment Notes [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0.1
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Cap [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(0.5)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		49.5
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Domain]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		2.1
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Master Funding Secured Railcar Equipment Notes [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0.1
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Cap [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 0
[1]	(Mark One)

Derivative Instruments and Fa_6

Derivative Instruments and Fair Value Accounting Derivative Effect on Interest (Details) - Interest Expense [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Interest Rate Swap, Expired, 2006 Secured Railcar Equipment Notes [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		$ 0	$ 0	$ 0.1	[1]	$ 0.1
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[2]	0		0
Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(0.1)	(0.1)	(0.2)		(0.2)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[2]	0.2		0.2
Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(0.5)	(0.5)	(1.5)		(1.5)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[2]	1.6		1.6
Interest Rate Swap, Expired, TRIP Master Funding Secured Railcar Equipment Notes [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(0.1)	(0.1)	(0.2)		(0.2)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[2]	0.1		0.1
Interest Rate Cap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0.1	0	0.1		0.1
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[2]	(0.1)		(0.1)
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(3.1)	$ (0.6)	(7.8)		$ (1.9)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[2]	$ 10.9		$ 10.9
[1]	(Mark One)
[2]	(Mark One)

Derivative Instruments and Fa_7

Derivative Instruments and Fair Value Accounting FX Hedge (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
		Sep. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Foreign Currency Fair Value Hedge Derivative [Line Items]
Total stockholders' equity		$ 2,093.6	$ 2,093.6	$ 2,160.4	$ 2,466.1	$ 2,378.9	$ 2,459.3	$ 2,529.6	$ 2,565.1	$ 2,562
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative, Notional Amount		55	55
Derivative Liability		2.1	2.1
Foreign Exchange Contract [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member]
Foreign Currency Fair Value Hedge Derivative [Line Items]
Total stockholders' equity		(2.3)	(2.3)
Foreign Exchange Contract [Member] | Interest Expense [Member] | Designated as Hedging Instrument [Member]
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		2.3	4.1
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[1]	$ (2.3)	$ (2.3)
[1]	(Mark One)

Derivative Instruments and Fa_8

Derivative Instruments and Fair Value Accounting - Assets and liabilities Measured at fair value on recurring basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Sep. 30, 2020	Dec. 31, 2019
Level 1
Assets:
Cash equivalents		$ 24.2	$ 57.9
Restricted cash		101.1	111.4
Total assets		125.3	169.3
Level 2
Assets:
Total assets	[1]	2.1	1.2
Level 2 | Other Assets [Member]
Assets:
Foreign currency hedge (1)	[1]	2.1	1.2
Level 2 | Accrued Liabilities [Member]
Liabilities [Abstract]
Total liabilities	[2]	50	28
Level 3
Assets:
Total assets		0
Interest Rate Swap [Member] | Level 2 | Accrued Liabilities [Member]
Liabilities [Abstract]
Interest rate hedge (2)	[2]	$ 50	$ 28
[1]	(Mark One)
[2]	(Mark One)

Segment Information - Financial

Segment Information - Financial information for segments (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
External Revenue	$ 459.4			$ 813.6			$ 1,583.8	$ 2,154.4
Total Revenues	459.4			813.6			1,583.8	2,154.4
Operating Profit (Loss)	72.9			120.3			(161.4)	319.1
Impairment of long-lived assets	0			0			(369.4)	0
Restructuring activities, net	4.7			0			10.5	0
Other (income) expense	53.7			54			164.1	161
Provision (benefit) for income taxes	(6.7)			18.2			(226.1)	41.2
Loss from discontinued operations, net of benefit for income taxes of $—, $0.1, $0.1, and $0.6	0			(0.4)			(0.2)	(2.3)
Net income (loss)	25.9	$ (287.8)	$ 162.3	47.7	$ 36.8	$ 30.1	(99.6)	114.6
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	0						0	0
Intersegment Eliminations [Member] | Consolidated Subsidiaries, Leasing [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	(166)			(314)			(512.4)	(913)
Total Revenues	(166)			(314)			(512.4)	(913)
Operating Profit (Loss)	(2.6)			(40.7)			(33.5)	(109.5)
Intersegment Eliminations [Member] | Consolidated Subsidiaries, Excluding Leasing [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	(2.3)			(4.2)			(8.3)	(12.6)
Total Revenues	(2.3)			(4.2)			(8.3)	(12.6)
Operating Profit (Loss)	1			(0.1)			(0.3)	(0.3)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	459.4			813.6			1,583.8	2,154.4
Rail Products Group [Member]
Segment Reporting Information [Line Items]
External Revenue	213.1			418.8			777.6	1,156.6
Rail Products Group [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	168.1			316.3			518.6	919.2
Rail Products Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	381.2			735.1			1,296.2	2,075.8
Operating Profit (Loss)	3.2			65.4			36.2	180.8
Restructuring activities, net	2.2						4.8
Railcar Leasing and Management Services Group [Member]
Segment Reporting Information [Line Items]
External Revenue	183.7			326.2			612.4	803.3
Railcar Leasing and Management Services Group [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	0.2			0.2			0.6	0.6
Railcar Leasing and Management Services Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	183.9			326.4			613	803.9
Operating Profit (Loss)	89.7			115.7			265.5	306.3
Restructuring activities, net	1.4						1.4
All Other
Segment Reporting Information [Line Items]
External Revenue	62.6			68.6			193.8	194.5
All Other | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	0			1.7			1.5	5.8
All Other | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	62.6			70.3			195.3	200.3
Operating Profit (Loss)	7.3			3.9			23.9	19.9
Restructuring activities, net	0.1						3.3
Operating Segments [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Profit (Loss)	100.2			185			325.6	507
Corporate, Non-Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Profit (Loss)	(21)			$ (23.9)			(73.3)	$ (78.1)
Restructuring activities, net	$ 1						$ 7.6

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
	Sep. 30, 2020segment
Segment Reporting [Abstract]
Number of Reportable Segments	3

Partially-Owned Leasing Subsi_2

Partially-Owned Leasing Subsidiaries - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)board_membersubsidiary
Partially-owned subsidiaries
Noncontrolling Interest [Line Items]
Parent Company Guarantees | $	$ 0
Railcar Leasing and Management Services Group [Member] | Partially-owned subsidiaries
Noncontrolling Interest [Line Items]
Number of Subsidiaries | subsidiary	2
Number of Board Members | board_member	7
Number of Board Members of Subsidiary, Designated by Parent | board_member	2
Partially-owned subsidiaries | Railcar Leasing and Management Services Group [Member]
Noncontrolling Interest [Line Items]
Carrying Value of Investment In Partially-Owned Consolidated Subsidiary | $	$ 145.4
Noncontrolling Interest, Ownership Percentage by Parent	38.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	62.00%

Railcar Leasing and Managemen_3

Railcar Leasing and Management Services Group - Selected consolidating financial information for the Leasing Group (Details) - USD ($) $ in Millions		Sep. 30, 2020		Dec. 31, 2019
Segment Reporting Information [Line Items]
Receivables, net of allowance		$ 219.9		$ 260.1
Property, Plant and Equipment, Net		6,937.9		7,110.6
Restricted cash		101.1		111.4
Other assets		276.6		396.2
Total assets		8,723.2		8,701.4
Total debt		4,935.1		4,881.9
Other liabilities		141.2		96.3
Total liabilities		6,629.6		6,322.5
Noncontrolling interest		276.3		348.8
Total Equity		1,817.3		2,030.1
Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents		2.5		1.8
Receivables, net of allowance		90.5		82.6
Property, Plant and Equipment, Net		7,330.3	[1]	7,605.6
Restricted cash		101.1		111.4
Other assets		39.3		211.2
Total assets		7,563.7		8,012.6
Accounts payable and accrued liabilities		179		145.3
Total debt		4,412		4,359.1
Deferred income taxes		926.5		862.8
Other liabilities		26.9		32.7
Total liabilities		5,544.4		5,399.9
Noncontrolling interest		276.3		348.8
Total Equity		1,743		2,263.9
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Net		(826.8)		(903.8)
Railcar Leasing and Management Services Group [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents		2.5		1.8
Receivables, net of allowance		90.5		82.6
Property, Plant and Equipment, Net		6,503.5	[1]	6,701.8
Restricted cash		101.1		111.4
Other assets		39.3		211.2
Total assets		6,736.9		7,108.8
Accounts payable and accrued liabilities		179		145.3
Total debt		4,412		4,359.1
Deferred income taxes		732.7		678
Other liabilities		26.9		32.7
Total liabilities		5,350.6		5,215.1
Noncontrolling interest		276.3		348.8
Total Equity		1,110		1,544.9
Wholly-owned subsidiaries | Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents		2.5		1.8
Receivables, net of allowance		81.3		73.9
Property, Plant and Equipment, Net		5,692.5	[1]	5,818.9
Restricted cash		73		78.4
Other assets		38.1		209.8
Total assets		5,887.4		6,182.8
Accounts payable and accrued liabilities		148.6		100.7
Total debt		3,172.7		3,080.7
Deferred income taxes		925.3		861.7
Other liabilities		26.9		32.7
Total liabilities		4,273.5		4,075.8
Noncontrolling interest		0		0
Total Equity		1,613.9		2,107
Partially-owned subsidiaries | Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents		0		0
Receivables, net of allowance		9.2		8.7
Property, Plant and Equipment, Net		1,637.8	[1]	1,786.7
Restricted cash		28.1		33
Other assets		1.2		1.4
Total assets		1,676.3		1,829.8
Accounts payable and accrued liabilities		30.4		44.6
Total debt		1,239.3		1,278.4
Deferred income taxes		1.2		1.1
Other liabilities		0		0
Total liabilities		1,270.9		1,324.1
Noncontrolling interest		276.3		348.8
Total Equity		129.1		156.9
Consolidated Subsidiaries, Leasing [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents		0		0
Receivables, net of allowance		0		0
Property, Plant and Equipment, Net	[2]	(826.8)	[1]	(903.8)
Restricted cash		0		0
Other assets		0		0
Total assets		(826.8)	[2]	(903.8)
Accounts payable and accrued liabilities		0		0
Total debt		0		0
Deferred income taxes	[2]	(193.8)		(184.8)
Other liabilities		0		0
Total liabilities	[2]	(193.8)		(184.8)
Noncontrolling interest		0		0
Total Equity	[2]	$ (633)		$ (719)
[1]	See Note 10 for further information regarding impairment of long-lived assets recorded in the nine months ended September 30, 2020.
[2]	Net deferred profit on railcars sold to the Leasing Group consists of intersegment profit that is eliminated in consolidation. Net deferred profit and the related deferred tax impact are included as adjustments to the property, plant, and equipment, net and deferred income taxes line items, respectively, in the Eliminations – Lease Subsidiary column above to reflect the net book value of the railcars purchased by the Leasing Group from the Rail Products Group based on manufacturing cost. See Note 4 and Note 7 for a further discussion regarding our investment in our partially-owned leasing subsidiaries and the related indebtedness.

Railcar Leasing and Managemen_4

Railcar Leasing and Management Services Group - Selected consolidating income statement information for the Leasing Group (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020		Sep. 30, 2019
Revenues:
Revenues	$ 459.4		$ 813.6		$ 1,583.8		$ 2,154.4
Sales-type lease revenues	0		26.3		0		60.5
Operating profit (2):
Total operating profit	72.9		120.3		(161.4)		319.1
Select expense information:
Depreciation (3)(4)					199.5		210.5
Rent	3.7		4		12.2		13.3
Selling, engineering, and administrative expenses	51.2		62.1		172.3		191.5
Interest	52.3		55.8		166.6		165.5
Leasing [Member]
Revenues:
Revenues	183.7		326.2		612.4		803.3
Select expense information:
Selling, engineering, and administrative expenses	11.7		10.7		39		36.2
Operating Segments [Member]
Revenues:
Revenues	459.4		813.6		1,583.8		2,154.4
Railcar Leasing and Management Services Group [Member] | Operating Segments [Member]
Revenues:
Revenues	$ 183.9		326.4		$ 613		803.9
Revenues, Percent Change	(43.70%)				(23.70%)
Operating profit (2):
Total operating profit	$ 89.7		$ 115.7		$ 265.5		$ 306.3
Operating Income (Loss), Percent Change	(22.50%)				(13.30%)
Operating Profit Margin	48.80%		35.40%		43.30%		38.10%
Select expense information:
Depreciation (3)(4)	$ 51.5	[1],[2]	$ 59.4		$ 159.1	[1],[2]	$ 171.6
Depreciation, Depletion, and Amortization, Percent Change	(13.30%)				(7.30%)
Maintenance and compliance	$ 18.5		24.9		$ 67.4		79.2
Maintenance Costs, Percent Change	(25.70%)				(14.90%)
Rent	$ 2.1		3.8		$ 8.1		13.6
Operating Leases, Rent Expense, Percent Change	(44.70%)				(40.40%)
Selling, engineering, and administrative expenses	$ 11.7		10.7		$ 39		36.2
Selling, Engineering, and Administrative Expense, Percent Change	9.30%				7.70%
Interest	$ 47		50		$ 149.2		146.4
Interest Expense, Percent Change	(6.00%)				1.90%
Railcar Leasing and Management Services Group [Member] | Operating Segments [Member] | Leasing and Management [Member]
Revenues:
Revenues	$ 183.9		190.1		$ 558.6		566.6
Revenues, Percent Change	(3.30%)				(1.40%)
Operating profit (2):
Total operating profit	$ 86.8		$ 79.8		$ 247.8		$ 234.6
Operating Income (Loss), Percent Change	8.80%				5.60%
Operating Profit Margin	47.20%		42.00%		44.40%		41.40%
Railcar Leasing and Management Services Group [Member] | Operating Segments [Member] | Railcar Owned One Year or Less [Member]
Revenues:
Revenues	$ 0		$ 136.3	[3]	$ 54.4		$ 237.3	[3]
Revenues, Percent Change	(100.00%)				(77.10%)
Operating profit (2):
Total operating profit	$ 0		$ 17.8		$ 0.4		$ 27
Operating Income (Loss), Percent Change	(100.00%)				(98.50%)
Operating Profit Margin	0.00%		13.10%		0.70%		11.40%
Railcar Leasing and Management Services Group [Member] | Operating Segments [Member] | Railcar Owned Greater than One Year [Member]
Operating profit (2):
Total operating profit	$ 2.9		$ 18.1		$ 17.3		$ 44.7
Operating Income (Loss), Percent Change	(84.00%)				(61.30%)
Operating Profit Margin	44.60%		24.10%		12.50%		25.50%
Service Life [Member]
Select expense information:
Depreciation (3)(4)	$ 7.7				$ 23.1
Reduced Depreciation [Member]
Select expense information:
Depreciation (3)(4)	$ 3.5
[1]	As a result of the impairment of long-lived assets related to our small cube covered hopper railcars recorded in the second quarter of 2020, our quarterly depreciation expense beginning in the third quarter of 2020 has decreased by approximately $3.5 million.
[2]	Effective January 1, 2020, we revised the estimated useful lives and salvage values of certain railcar types in our lease fleet. This change in estimate resulted in a decrease in depreciation expense in the three and nine months ended September 30, 2020 of approximately $7.7 million and $23.1 million, respectively. This decrease was partially offset by higher depreciation associated with growth in the lease fleet. See Note 1 of the Consolidated Financial Statements for further information. (4) As a result of the impairment of long-lived assets related to our small cube covered hopper railcars recorded in the second quarter of 2020, our quarterly depreciation expense beginning in the third quarter of 2020 has decreased by approximately $3.5 million.
[3]	Includes revenues associated with sales-type leases of $26.3 million and $60.5 million for the three and nine months ended September 30, 2019, respectively.

Railcar Leasing and Managemen_5

Railcar Leasing and Management Services Group - Schedule of proceeds from leased railcars (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019
Property Subject to or Available for Operating Lease [Line Items]
Sales-type lease revenues	$ 0	$ 26.3		$ 0	$ 60.5
Operating profit on sales of leased railcars:	72.9	120.3		(161.4)	319.1
Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating profit on sales of leased railcars:	$ 89.7	$ 115.7		$ 265.5	$ 306.3
Operating profit margin on sales of leased railcars:	48.80%	35.40%		43.30%	38.10%
Operating Segments [Member] | Railcar Owned One Year or Less [Member] | Railcar Leasing and Management Services Group [Member]
Property Subject to or Available for Operating Lease [Line Items]
Sales of leased railcars:	$ 0	$ 136.3	[1]	$ 54.4	$ 237.3	[1]
Operating profit on sales of leased railcars:	$ 0	$ 17.8		$ 0.4	$ 27
Operating profit margin on sales of leased railcars:	0.00%	13.10%		0.70%	11.40%
Operating Segments [Member] | Railcar Owned Greater than One Year [Member] | Railcar Leasing and Management Services Group [Member]
Property Subject to or Available for Operating Lease [Line Items]
Sales of leased railcars:	$ 6.5	$ 75.1		$ 138.7	$ 175
Operating profit on sales of leased railcars:	$ 2.9	$ 18.1		$ 17.3	$ 44.7
Operating profit margin on sales of leased railcars:	44.60%	24.10%		12.50%	25.50%
Operating Segments [Member] | Sales of Leased Railcars [Domain] | Railcar Leasing and Management Services Group [Member]
Property Subject to or Available for Operating Lease [Line Items]
Sales of leased railcars:	$ 6.5	$ 211.4		$ 193.1	$ 412.3
Operating profit on sales of leased railcars:	$ 2.9	$ 35.9		$ 17.7	$ 71.7
Operating profit margin on sales of leased railcars:	44.60%	17.00%		9.20%	17.40%
[1]	Includes revenues associated with sales-type leases of $26.3 million and $60.5 million for the three and nine months ended September 30, 2019, respectively.

Railcar Leasing and Managemen_6

Railcar Leasing and Management Services Group - Future contractual minimum rental revenues on leases (Details) - Railcar Leasing and Management Services Group [Member] $ in Millions	Sep. 30, 2020USD ($)
Future contractual minimum rental revenue
Remaining three months of 2020	$ 152	[1]
2021	516.5	[1]
2022	406.5	[1]
2023	296.9	[1]
2024	215.2	[1]
Thereafter	391.6	[1]
Total	1,978.7	[1]
Railroad Transportation Equipment
Future contractual minimum rental revenue
Remaining three months of 2020	150.3
2021	511.2
2022	402.8
2023	295.2
2024	214.5
Thereafter	391.5
Total	$ 1,965.5
[1]	Total contractual minimum rental revenues on operating leases relates to our wholly-owned and partially-owned subsidiaries and sub-lease rental revenues associated with the Leasing Group's operating lease obligations.

Railcar Leasing and Managemen_7

Railcar Leasing and Management Services Group - Future operating lease obligations and future contractual minimum rental revenues (Details) $ in Millions	Sep. 30, 2020USD ($)
Future contractual minimum rental revenues
Total operating lease payments	$ 123.3
Railcar Leasing and Management Services Group [Member]
Future operating lease obligations
Remaining three months of 2020	2.1
2021	8.2
2022	7.5
2023	5.7
2024	2.5
Thereafter	0.9
Total	26.9
Future contractual minimum rental revenues
Total operating lease payments	29
Railcar Leasing and Management Services Group [Member] | Building [Member]
Future contractual minimum rental revenues
Total operating lease payments	2.1
Railcar Leasing and Management Services Group [Member] | Property Lease Guarantee [Member]
Future contractual minimum rental revenues
Guarantor Obligations, Maximum Exposure, Undiscounted	2.1
Railcar Leasing and Management Services Group [Member] | Operating leases
Future contractual minimum rental revenues
Remaining three months of 2020	1.7
2021	5.3
2022	3.7
2023	1.7
2024	0.7
Thereafter	0.1
Total	$ 13.2

Railcar Leasing and Managemen_8

Railcar Leasing and Management Services Group - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2018
Minimum
Segment Reporting Information [Line Items]
Lessee, Operating Lease, Term of Contract	1 year
Maximum
Segment Reporting Information [Line Items]
Lessee, Operating Lease, Term of Contract	16 years
Railcar Leasing and Management Services Group [Member] | Minimum
Segment Reporting Information [Line Items]
Lessor, Operating Lease, Term of Contract	1 year
Railcar Leasing and Management Services Group [Member] | Maximum
Segment Reporting Information [Line Items]
Lessor, Operating Lease, Term of Contract	10 years	20 years
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member]
Segment Reporting Information [Line Items]
Net book value of unpledged equipment	$ 1,431.3
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Secured Debt [Member]
Segment Reporting Information [Line Items]
Debt Instrument, Collateral Amount	4,249.1
TRIP Holdings [Member] | Railcar Leasing and Management Services Group [Member] | Secured Debt [Member] | TRIP Master Funding Secured Railcar Equipment Notes [Member]
Segment Reporting Information [Line Items]
Debt Instrument, Collateral Amount	1,159.5
Trinity Rail Leasing 2012 [Member] | Railcar Leasing and Management Services Group [Member] | Secured Debt [Member] | TRL 2012 Secured Railcar Equipment Notes - RIV 2013 [Member]
Segment Reporting Information [Line Items]
Debt Instrument, Collateral Amount	$ 478.3

Property, Plant, and Equipmen_2

Property, Plant, and Equipment - Components of property, plant, and equipment (Details) - USD ($) $ in Millions	Sep. 30, 2020		Dec. 31, 2019
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	$ 9,153.9		$ 9,272.5
Less: accumulated depreciation	(2,216)		(2,161.9)
Property, Plant and Equipment, Net	6,937.9		7,110.6
Intersegment Eliminations [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	(1,063.8)		(1,135.8)
NegativeAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	237		232
Property, Plant and Equipment, Net	(826.8)		(903.8)
Railcar Leasing and Management Services Group [Member] | Operating Segments [Member]
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Net	7,330.3	[1]	7,605.6
Manufacturing and Corporate [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	1,089.5		1,040.4
Less: accumulated depreciation	(655.1)		(631.6)
Property, Plant and Equipment, Net	434.4		408.8
Manufacturing and Corporate [Member] | Land
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	28.6		28.4
Manufacturing and Corporate [Member] | Buildings and improvements
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	416.2		402.2
Manufacturing and Corporate [Member] | Machinery and other
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	556.3		546.7
Manufacturing and Corporate [Member] | Construction in progress
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	88.4		63.1
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Operating Segments [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	6,882.6		6,957.9
Less: accumulated depreciation	(1,190.1)		(1,139)
Property, Plant and Equipment, Net	5,692.5	[1]	5,818.9
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Machinery and other | Operating Segments [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	13.9		13.7
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Equipment on lease | Operating Segments [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	6,868.7		6,944.2
Partially-owned subsidiaries
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	1,929.5		2,065.3
Less: accumulated depreciation	(513.9)		(527.7)
Partially-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Operating Segments [Member]
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Net	1,637.8	[1]	1,786.7
Partially-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Equipment on lease | Operating Segments [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,929.5 and $2,065.3	2,245.6		2,410
Less: accumulated depreciation	$ (607.8)		$ (623.3)
[1]	See Note 10 for further information regarding impairment of long-lived assets recorded in the nine months ended September 30, 2020.

Debt - Components of debt (Deta

Debt - Components of debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total recourse debt	$ 523.1	$ 522.8
Non-Recourse Debt, Gross
Total debt	4,935.1	4,881.9
Level 1
Debt Instrument [Line Items]
Long-term Debt, Fair Value	1,369.2	1,105.5
Level 2
Debt Instrument [Line Items]
Long-term Debt, Fair Value	407.4	411.7
Level 3
Debt Instrument [Line Items]
Long-term Debt, Fair Value	3,384.7	3,547.4
Fair Value, Inputs, Level 1, 2 and 3
Debt Instrument [Line Items]
Long-term Debt, Fair Value	5,161.3	5,064.6
Corporate Segment [Member]
Debt Instrument [Line Items]
Long-term Debt, Net of Unamortized Discount, Gross of Unamortized Debt Issuance Costs	524.8	524.8
Less: unamortized debt issuance costs	1.7	2
Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Non-Recourse Debt	4,412	4,359.1
Senior Notes [Member] | Corporate Segment [Member]
Debt Instrument [Line Items]
Long-term Debt, Net of Unamortized Discount, Gross of Unamortized Debt Issuance Costs	399.8	399.8
Debt Instrument, Unamortized Discount	0.2	0.2
Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Non-Recourse Debt	3,172.7	3,080.7
Wholly Owned Subsidiaries [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Less: unamortized debt issuance costs	20.3	23.9
Non-Recourse Debt, Gross of Issuance Cost, Net of Discount	3,193	3,104.6
Non-Recourse Debt	3,172.7	3,080.7
Wholly Owned Subsidiaries [Member] | Secured Debt [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	1.1	2
Non-Recourse Debt, Gross of Issuance Cost, Net of Discount	1,948.8	2,124.1
Wholly Owned Subsidiaries [Member] | 2017 Secured Railcar Equipment Notes [Member] [Domain] | Promissory Notes [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	10.7	0
Non-Recourse Debt, Gross of Issuance Cost, Net of Discount	813.7	627.1
Partially-Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Non-Recourse Debt	1,239.3	1,278.4
Partially-Owned Subsidiaries [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Less: unamortized debt issuance costs	9.6	10.9
Non-Recourse Debt, Gross	1,248.9	1,289.3
Non-Recourse Debt	1,239.3	1,278.4
Revolving Credit Facility [Member] | Line of Credit [Member] | Corporate Segment [Member]
Debt Instrument [Line Items]
Long-term Debt, Net of Unamortized Discount, Gross of Unamortized Debt Issuance Costs	125	125
Revolving Credit Facility [Member] | TILC [Member] | TILC Warehouse Facility [Member] | Line of Credit [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
TILC warehouse facility	$ 430.5	$ 353.4

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($) $ in Millions	Oct. 19, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Loss on early extinguishment of debt		$ 5	$ 0
Corporate Segment [Member]
Debt Instrument [Line Items]
Long-term Debt, Net of Unamortized Discount, Gross of Unamortized Debt Issuance Costs		524.8		$ 524.8
Corporate Segment [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Net of Unamortized Discount, Gross of Unamortized Debt Issuance Costs		$ 399.8		399.8
Corporate Segment [Member] | Senior Notes [Member] | 4.55% Senior Notes Due October 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.55%
Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity		$ 278.7
Proceeds from Lines of Credit		455
Repayments of Lines of Credit		455
Long-term Debt, Net of Unamortized Discount, Gross of Unamortized Debt Issuance Costs		125		125
Line of Credit Facility, Remaining Borrowing Capacity		$ 289.8
Debt Instrument, Interest Rate, Effective Percentage		1.50%
Line of Credit Facility, Interest Rate at Period End		0.20%
Line of Credit Facility, Maximum Borrowing Capacity		$ 450
Corporate Segment [Member] | Letter of Credit [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		35.2
Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Non-Recourse Debt		$ 4,412		4,359.1
TILC [Member] | Railcar Leasing and Management Services Group [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | TILC Warehouse Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		1.76%
Debt Instrument, Face Amount		$ 750
Borrowings on Warehouse Loan Facility		168.5
Repayments on Warehouse Loan Facility		91.4
TILC warehouse facility		430.5		353.4
Line of Credit Facility, Remaining Borrowing Capacity Exclusive of Current Restrictions		319.5
Wholly-owned subsidiaries
Debt Instrument [Line Items]
Non-Recourse Debt		3,172.7		3,080.7
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Non-Recourse Debt		$ 3,172.7		$ 3,080.7
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | 2006 Secured Railcar Equipment Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		5.90%
Extinguishment of Debt, Amount		$ 104.7
Loss on early extinguishment of debt		5
Redemption Premium		4.7
Amortization of Debt Issuance Costs		$ 0.3
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | 2018 Secured Railcar Equipment Notes [Domain]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		3.82%
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | 2018 Secured Railcar Equipment Notes [Domain] | Subsequent Event [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	$ 153.1
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | 2020 Secured Railcar Equipment Notes [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.96%
Proceeds from Issuance of Debt	$ 155.5
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Promissory Notes [Member] | 2017 Secured Railcar Equipment Notes [Member] [Domain]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		1.50%
Proceeds from Issuance of Debt		$ 225
Repayments of Long-term Lines of Credit		$ 48.3
Minimum | Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		0.30%
Line of Credit Facility, Interest Rate at Period End		0.175%
Maximum | Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		0.30%

Income Taxes Narrative (Details

Income Taxes Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2017	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	21.00%	35.00%
Tax Adjustments, Settlements, and Unusual Provisions			$ 174.6
Effective Income Tax Rate Reconciliation, Percent	(34.90%)	27.50%	69.50%	26.10%
Income Taxes Paid, Net			$ 1.3
Income tax receivable	$ 485		485			$ 14.7
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions			307.1
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions			$ 169.7

Employee Retirement Plans - Com

Employee Retirement Plans - Components of net retirement cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 0	$ 0	$ 0	$ 0.1
Interest	3.8	5	11.2	14.8
Expected return on plan assets	(5.3)	(5.8)	(15.7)	(17.3)
Amortization of actuarial loss	1.5	1.2	4.5	3.4
Amortization of prior service cost	0.3	0	0.9	0
Net periodic benefit cost	0.3	0.4	0.9	1
Profit sharing	1.9	3.1	6.5	8.3
Net expense	2.2	3.5	7.4	9.3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0	$ 0	$ 0

Employee Retirement Plans - Nar

Employee Retirement Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0	$ 0	$ 0
Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Remainder of Fiscal Year	145		145
Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Remainder of Fiscal Year	$ 160		$ 160

Restructuring Activities (Detai

Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Impaired Assets to be Disposed of by Method Other than Sale, Fair Value of Asset		$ 191.7
Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset		550
Impairment of Long-Lived Assets Held-for-use		358.3
Operating Lease, Impairment Loss		$ 11.1
Restructuring Reserve	$ 2.7				$ 2.7		$ 3.4
Employee severance costs	3.4				7.5
Charges and adjustments					8.1
Non-cash impact of restructuring activities	0.7		$ 5.2		5.9	$ 0
Asset impairment charges:					2.4
Payments					(8.8)
Restructuring Charges	(4.7)			$ 0	(10.5)	$ 0
Loss on Contract Termination	0.6				0.6
Gain (Loss) on Disposition of Assets					(3.5)
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2.1				2.1
Contract Termination
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.6				0.6		$ 0
Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance costs	1.4				1.4
Non-cash impact of restructuring activities	0				0
Restructuring Charges	(1.4)				(1.4)
Loss on Contract Termination	0				0
Gain (Loss) on Disposition of Assets					0
Operating Segments [Member] | Rail Products Group [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance costs	1.3				3.9
Non-cash impact of restructuring activities	0.7				0.7
Restructuring Charges	(2.2)				(4.8)
Loss on Contract Termination	0.2				0.2
Gain (Loss) on Disposition of Assets					0
Operating Segments [Member] | Other Segments [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance costs	0.1				0.2
Non-cash impact of restructuring activities	0				0
Restructuring Charges	(0.1)				(3.3)
Loss on Contract Termination	0				0
Gain (Loss) on Disposition of Assets					(3.5)
Operating Segments [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance costs	0.6				2
Non-cash impact of restructuring activities	0				5.2
Restructuring Charges	(1)				(7.6)
Loss on Contract Termination	$ 0.4				0.4
Gain (Loss) on Disposition of Assets					$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Changes in accumulated other comprehensive loss (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (164.5)						$ (164.5)		$ (153.1)
Changes in accumulated other comprehensive loss
Other comprehensive loss, net of tax, before reclassifications							(25.3)
Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $—, $3.0, $1.2, and $4.2							14.8
Reclassification from AOCI, Current Period, Tax							4.2
Less: noncontrolling interest	(8.1)	$ (4.6)	$ 23.2	$ 2.7	$ 6.2	$ 3.8	10.5	$ 12.7
Other comprehensive income (loss)							(11.4)
Currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1.3)						(1.3)		(1.3)
Changes in accumulated other comprehensive loss
Other comprehensive loss, net of tax, before reclassifications							0
Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $—, $3.0, $1.2, and $4.2							0
Reclassification from AOCI, Current Period, Tax							0
Other comprehensive income (loss)							0
Unrealized gain/(loss) on derivative financial instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(33.5)						(33.5)		(17.9)
Changes in accumulated other comprehensive loss
Other comprehensive loss, net of tax, before reclassifications							(25.3)
Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $—, $3.0, $1.2, and $4.2							10.6
Reclassification from AOCI, Current Period, Tax							3
Other comprehensive income (loss)							(15.6)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest [Member]
Changes in accumulated other comprehensive loss
Less: noncontrolling interest							(0.9)
Net actuarial gains/(losses) and prior service costs of defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(129.7)						(129.7)		(133.9)
Changes in accumulated other comprehensive loss
Other comprehensive loss, net of tax, before reclassifications							0
Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $—, $3.0, $1.2, and $4.2							4.2
Reclassification from AOCI, Current Period, Tax							1.2
Other comprehensive income (loss)							4.2
Noncontrolling Interest [Member]
Changes in accumulated other comprehensive loss
Less: noncontrolling interest	(0.3)	(0.3)	(0.3)	(0.4)	(0.3)	(0.3)	(0.9)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(164.5)						$ (164.5)		$ (153.1)
Changes in accumulated other comprehensive loss
Less: noncontrolling interest	$ (7.8)	$ (4.3)	$ 23.5	$ 3.1	$ 6.5	$ 4.1

Common Stock and Stock-Based _5

Common Stock and Stock-Based Compensation Stockholders Equity (Details) - USD ($) $ in Millions	3 Months Ended							9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Oct. 23, 2020
Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount						$ 350	$ 350
Stock Repurchase Program, Number of Shares Authorized to be Repurchased						13,700,000
Treasury Stock, Shares, Acquired							866,715
Treasury Stock, Value, Acquired, Cost Method	$ 89.9		$ 35.4		$ 100.9	$ 44	$ 19
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 0	$ 89.9	$ 89.9	$ 125.3	186.1	287	331	$ 186.1
Total Shares Repurchased Under Program	17,421,690
Total Shares Repurchased Under Program, Value	$ 350
Share-based Payment Arrangement, Cash Used to Settle Award	$ 4.9
Share-based Payment Arrangement, Accelerated Cost								$ 70
Subsequent Event [Member]
Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount									$ 250
Additional Paid-in Capital [Member]
Share Repurchases [Line Items]
Treasury Stock, Shares, Acquired								2,600,000
Treasury Stock, Value, Acquired, Cost Method					$ 0	$ 0	$ 70
Treasury Stock [Member]
Share Repurchases [Line Items]
Treasury Stock, Shares, Acquired	4,466,896	0	1,850,000	2,933,474	5,171,489	2,133,116	3,500,000
Treasury Stock, Value, Acquired, Cost Method	$ 89.9	$ 0	$ 35.4	$ 60.8	$ 100.9	$ 44	$ 89

Common Stock and Stock-Based _6

Common Stock and Stock-Based Compensation Stock-based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 4.8	$ 7.6	$ 7.3	$ 8.4	$ 7.5	$ 5.5	$ 19.7	$ 21.4
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period							10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period							3 years
Number of Shares Granted							300,000
Weighted Average Grant-Date Fair Value per Award							$ 5.26
Exercise price							$ 21.61
Risk-free interest rate							1.48%
Expected life (in years)							6 years 6 months
Equity volatility							35.00%
Dividend yield							3.42%
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Granted							988,309
Weighted Average Grant-Date Fair Value per Award							$ 18.59
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period							1 year
Number of Shares Granted							20,939
Weighted Average Grant-Date Fair Value per Award							$ 18.51
Performance units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period							3 years
Number of Shares Granted							444,252
Weighted Average Grant-Date Fair Value per Award							$ 20.31
Minimum | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period							3 years
Maximum | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period							4 years

Earnings Per Common Share - EPS

Earnings Per Common Share - EPS calculation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Outstanding, Basic and Diluted	4.2	5.5	4.7	5.5
Income (loss) from continuing operations	$ 25.9	$ 48.1	$ (99.4)	$ 116.9
Less: Net (income) loss attributable to noncontrolling interest	(0.8)	1.3	79.5	1.4
Unvested restricted share participation — continuing operations	(0.2)	(0.6)	0	(1.6)
Net income (loss) from continuing operations attributable to Trinity Industries, Inc.	24.9	48.8	(19.9)	116.7
Loss from discontinued operations, net of benefit for income taxes of $—, $0.1, $0.1, and $0.6	0	(0.4)	(0.2)	(2.3)
Unvested restricted share participation — discontinued operations	0	0	0	0
Net loss from discontinued operations attributable to Trinity Industries, Inc.	0	(0.4)	(0.2)	(2.3)
Net income (loss) attributable to Trinity Industries, Inc., including the effect of unvested restricted share participation	$ 24.9	$ 48.4	$ (20.1)	$ 114.4
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.21	$ 0.39	$ (0.17)	$ 0.91
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	(0.02)
Basic net income (loss) attributable to Trinity Industries, Inc.	0.21	0.39	(0.17)	0.89
Income (Loss) from Continuing Operations, Per Diluted Share	0.21	0.39	(0.17)	0.90
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0	0	(0.02)
Diluted net income (loss) attributable to Trinity Industries, Inc.	$ 0.21	$ 0.39	$ (0.17)	$ 0.88
Computation of basic and diluted net income attributable to Trinity Industries, Inc
Basic weighted average shares outstanding	116.4	124.7	117.2	127.6
Effect of dilutive securities:
Nonparticipating unvested RSUs and RSAs	0.6	1.3	0	1.6
Diluted weighted average shares outstanding	117	126	117.2	129.2
Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.3	1.2	0	0.2
Stock options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.3		0

Contingencies - Narrative (Deta

Contingencies - Narrative (Details) - USD ($) $ in Millions	Jun. 09, 2015	Sep. 30, 2020
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 5.8
Accrued Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		10.2
Highway Products Litigation | False Claims Act, USA
Loss Contingencies [Line Items]
Loss Contingency, Judgment Entered, Value	$ 682.4
Highway Products Litigation | State, County, and Municipal Actions [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		0
Environmental and Workplace Matters [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		1.1
Minimum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		7.9
Maximum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		$ 16.8