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Consolidated Statement of Stockholders' Equity (unaudited) - USD ($) shares in Millions, $ in Millions | Total | Accelerated Share Repurchase Program | Common Stock | Capital in Excess of Par Value | Capital in Excess of Par Value Accelerated Share Repurchase Program | Retained Earnings | Accumulated other comprehensive income (loss) | Treasury Stock | Treasury Stock Accelerated Share Repurchase Program | Trinity Stockholders’ Equity | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
$0.01 Par Value |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (83.3) |  |  |  |  | 0.0 |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2021 |  | $ 1,296.8 |  | $ 0.8 | $ 0.0 |  | $ 1,046.6 | $ (17.0) | $ (0.6) |  | $ 1,029.8 | $ 267.0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 1.9 |  |  |  |  | (0.7) |  |  |  | (0.7) | 2.6
Other comprehensive loss |  | 17.3 |  |  |  |  |  | 17.1 |  |  | 17.1 | 0.2
Cash dividends declared on common stock (1) | [1] | (19.3) |  |  |  |  | (19.3) |  |  |  | (19.3) |
Distributions to noncontrolling interest |  | (6.2) |  |  |  |  |  |  |  |  |  | (6.2)
Stock-based compensation expense |  | 5.1 |  |  | 5.1 |  |  |  |  |  | 5.1 |
Settlement of share-based awards, net |  | 0.0 |  |  | 0.2 |  |  |  | (0.2) |  | 0.0 |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2022 |  | $ 1,295.6 |  | 0.8 | 5.3 |  | 1,026.6 | 0.1 | (0.8) |  | 1,032.0 | 263.6
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared |  | $ 0.23 |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2021 |  | $ 1,296.8 |  | 0.8 | 0.0 |  | 1,046.6 | (17.0) | (0.6) |  | 1,029.8 | 267.0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 36.7 |  |  |  |  |  |  |  |  |  |
Other comprehensive loss |  | 32.9 |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  | 16.7 |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2022 |  | $ 1,261.1 |  | $ 0.8 | 6.1 |  | 997.7 | 16.4 | $ (15.1) |  | 1,005.9 | 255.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased |  |  | (0.8) |  |  |  |  |  |  |  |  |
Shares repurchased |  |  |  |  |  |  |  |  |  | $ (25.0) |  |
$0.01 Par Value |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (83.3) |  |  |  |  | 0.0 |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Mar. 31, 2022 |  | $ 1,295.6 |  | $ 0.8 | 5.3 |  | 1,026.6 | 0.1 | $ (0.8) |  | 1,032.0 | 263.6
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 8.5 |  |  |  |  | 3.7 |  |  |  | 3.7 | 4.8
Other comprehensive loss |  | 5.3 |  |  |  |  |  | 6.3 |  |  | 6.3 | (1.0)
Cash dividends declared on common stock (1) | [1] | (19.1) |  |  |  |  | (19.1) |  |  |  | (19.1) |
Distributions to noncontrolling interest |  | (8.8) |  |  |  |  |  |  |  |  |  | (8.8)
Stock-based compensation expense |  | 5.7 |  |  | 5.7 |  |  |  |  |  | 5.7 |
Settlement of share-based awards, net |  | (5.7) |  |  | 0.4 |  |  |  | (6.1) |  | (5.7) |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2022 |  | 1,256.2 |  | $ 0.8 | 0.0 |  | 991.1 | 6.4 | $ (0.7) |  | 997.6 | 258.6
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Restricted shares, net, (in shares) |  |  |  | (0.8) |  |  |  |  | (0.2) |  |  |
Shares repurchased |  |  |  |  |  |  |  |  | (1.0) | (0.8) |  |
Shares repurchased |  | (25.3) | $ 0.0 |  |  | $ (25.0) |  |  | $ (25.3) | $ (25.0) | (25.3) |
Treasury Stock, Shares, Retired |  |  |  | (2.0) |  |  |  |  | (2.0) |  |  |
Retirement of treasury stock |  | $ 0.0 |  | $ 0.0 | (36.4) |  | (20.1) |  | $ (56.5) |  | 0.0 |
Common Stock, Dividends, Per Share, Declared |  | $ 0.23 |  |  |  |  |  |  |  |  |  |
$0.01 Par Value |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (82.1) |  |  |  |  | 0.0 |  |  |
Net income |  | $ 26.3 |  |  |  |  | 25.8 |  |  |  | 25.8 | 0.5
Other comprehensive loss |  | 10.3 |  |  |  |  |  | 10.0 |  |  | 10.0 | 0.3
Cash dividends declared on common stock (1) | [1] | (19.2) |  |  |  |  | (19.2) |  |  |  | (19.2) |
Distributions to noncontrolling interest |  | (4.2) |  |  |  |  |  |  |  |  |  | (4.2)
Stock-based compensation expense |  | 5.9 |  |  | 5.9 |  |  |  |  |  | 5.9 |
Settlement of share-based awards, net |  | (0.1) |  |  | 0.2 |  |  |  | $ (0.3) |  | (0.1) |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2022 |  | 1,261.1 |  | $ 0.8 | 6.1 |  | 997.7 | 16.4 | $ (15.1) |  | 1,005.9 | 255.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased |  |  |  |  |  |  |  |  | (0.6) |  |  |
Shares repurchased |  | $ (14.1) |  |  |  |  |  |  | $ (14.1) |  | (14.1) |
Common Stock, Dividends, Per Share, Declared |  | $ 0.23 |  |  |  |  |  |  |  |  |  |
$0.01 Par Value |  | 0.01 |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (82.1) |  |  |  |  | (0.6) |  |  |
$0.01 Par Value |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (81.1) |  |  |  |  | 0.0 |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2022 |  | $ 1,269.6 |  | $ 0.8 | 0.0 |  | 992.6 | 19.7 | $ (0.7) |  | 1,012.4 | 257.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 13.7 |  |  |  |  | 4.4 |  |  |  | 4.4 | 9.3
Other comprehensive loss |  | (14.4) |  |  |  |  |  | (7.0) |  |  | (7.0) | (7.4)
Cash dividends declared on common stock (1) | [2] | (21.4) |  |  |  |  | (21.4) |  |  |  | (21.4) |
Distributions to noncontrolling interest |  | (2.9) |  |  |  |  |  |  |  |  |  | (2.9)
Stock-based compensation expense |  | 6.2 |  |  | 6.2 |  |  |  |  |  | 6.2 |
Settlement of share-based awards, net |  | (0.4) |  |  | 0.4 |  |  |  | (0.8) |  | (0.4) |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2023 |  | $ 1,250.4 |  | 0.8 | 6.6 |  | 975.6 | 12.7 | (1.5) |  | 994.2 | 256.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared |  | $ 0.26 |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2022 |  | $ 1,269.6 |  | 0.8 | 0.0 |  | 992.6 | 19.7 | (0.7) |  | 1,012.4 | 257.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 58.5 |  |  |  |  |  |  |  |  |  |
Other comprehensive loss |  | (9.2) |  |  |  |  |  |  |  |  |  | (7.2)
Stock-based compensation expense |  | 18.8 |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2023 |  | $ 1,253.4 |  | $ 0.8 | 12.2 |  | 971.1 | 17.7 | $ (1.0) |  | 1,000.8 | 252.6
$0.01 Par Value |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (81.1) |  |  |  |  | 0.0 |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Mar. 31, 2023 |  | $ 1,250.4 |  | $ 0.8 | 6.6 |  | 975.6 | 12.7 | $ (1.5) |  | 994.2 | 256.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 21.2 |  |  |  |  | 17.0 |  |  |  | 17.0 | 4.2
Other comprehensive loss |  | 5.0 |  |  |  |  |  | 4.9 |  |  | 4.9 | 0.1
Cash dividends declared on common stock (1) | [2] | (21.6) |  |  |  |  | (21.6) |  |  |  | (21.6) |
Distributions to noncontrolling interest |  | (6.1) |  |  |  |  |  |  |  |  |  | (6.1)
Stock-based compensation expense |  | 6.5 |  |  | 6.5 |  |  |  |  |  | 6.5 |
Settlement of share-based awards, net |  | (6.4) |  |  | 0.0 |  |  |  | (6.4) |  | (6.4) |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2023 |  | 1,249.0 |  | $ 0.8 | 5.9 |  | 971.0 | 17.6 | $ (0.7) |  | 994.6 | 254.4
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Restricted shares, net, (in shares) |  |  |  | (1.0) |  |  |  |  | (0.3) |  |  |
Treasury Stock, Shares, Retired |  |  |  | (0.3) |  |  |  |  | (0.3) |  |  |
Retirement of treasury stock |  | $ 0.0 |  |  | (7.2) |  | 0.0 |  | $ (7.2) |  | 0.0 |
Common Stock, Dividends, Per Share, Declared |  | $ 0.26 |  |  |  |  |  |  |  |  |  |
$0.01 Par Value |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (81.8) |  |  |  |  | 0.0 |  |  |
Net income |  | $ 23.6 |  |  |  |  | 21.8 |  |  |  | 21.8 | 1.8
Other comprehensive loss |  | 0.2 |  |  |  |  |  | 0.1 |  |  | 0.1 | 0.1
Cash dividends declared on common stock (1) | [2] | (21.7) |  |  |  |  | (21.7) |  |  |  | (21.7) |
Distributions to noncontrolling interest |  | (3.7) |  |  |  |  |  |  |  |  |  | (3.7)
Stock-based compensation expense |  | 6.1 |  |  | 6.1 |  |  |  |  |  | 6.1 |
Settlement of share-based awards, net |  | (0.1) |  |  | 0.2 |  |  |  | $ (0.3) |  | (0.1) |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2023 |  | $ 1,253.4 |  | $ 0.8 | $ 12.2 |  | $ 971.1 | $ 17.7 | $ (1.0) |  | $ 1,000.8 | $ 252.6
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared |  | $ 0.26 |  |  |  |  |  |  |  |  |  |
$0.01 Par Value |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | (81.8) |  |  |  |  | 0.0 |  |  |
[1] | Dividends of $0.23 per common share for all periods presented in 2022
[2] | Dividends of $0.26 per common share for all periods presented in 2023.

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