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Consolidated Statement of Changes in Stockholders’ Equity - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Common Stock Class A Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Treasury Stock At Cost | Parent | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at May. 31, 2019 |  | 33.4 | 1.7 |  |  |  |  |  |
Beginning balance at May. 31, 2019 | $ 1,272.8 | $ 0.4 | $ 0.0 | $ 620.8 | $ (59.7) | $ 1,012.6 | $ (302.6) | $ 1,271.5 | $ 1.3
Net Income (loss) | (43.7) |  |  |  |  | (43.8) |  | (43.8) | 0.1
Foreign currency translation adjustment | (2.9) |  |  |  | (2.9) |  |  | (2.9) |
Pension and post-retirement adjustments (net of tax of $0.4) | 4.3 |  |  |  | 4.3 |  |  | 4.3 |
Stock-based compensation | 3.8 |  |  | 3.8 |  |  |  | 3.8 |
Proceeds from issuance of common stock pursuant to stock-based compensation plans | 0.7 |  |  | 0.7 |  |  |  | 0.7 |
Purchases of treasury stock at cost (in shares) |  | (1.0) |  |  |  |  |  |  |
Purchases of treasury stock at cost | (35.5) |  |  |  |  |  | (35.5) | (35.5) |
Treasury stock issued pursuant to stock purchase plans (in shares) |  | 0.1 |  |  |  |  |  |  |
Treasury stock issued pursuant to equity-based plans | 1.9 |  |  | (2.9) |  |  | 4.8 | 1.9 |
Dividends | (20.8) |  |  |  |  | (20.8) |  | (20.8) |
Ending balance at May. 31, 2020 | 1,180.6 | $ 0.4 | $ 0.0 | 622.4 | (58.3) | 948.0 | (333.3) | 1,179.2 | 1.4
Ending balance (in shares) at May. 31, 2020 |  | 32.5 | 1.7 |  |  |  |  |  |
Pension and postretirement adjustments, tax portion | 0.4 |  |  |  |  |  |  |  |
Net Income (loss) | (10.9) |  |  |  |  | (11.0) |  | (11.0) | 0.1
Foreign currency translation adjustment | 19.9 |  |  |  | 19.9 |  |  | 19.9 |
Pension and post-retirement adjustments (net of tax of $0.4) | 3.7 |  |  |  | 3.7 |  |  | 3.7 |
Stock-based compensation | 6.6 |  |  | 6.6 |  |  |  | 6.6 |
Proceeds from issuance of common stock pursuant to stock-based compensation plans | 0.4 |  |  | 0.4 |  |  |  | 0.4 |
Purchases of treasury stock at cost (in shares) |  | 0.0 |  |  |  |  |  |  |
Purchases of treasury stock at cost | 0.0 |  |  |  |  |  | 0.0 | 0.0 |
Treasury stock issued pursuant to stock purchase plans (in shares) |  | 0.2 |  |  |  |  |  |  |
Treasury stock issued pursuant to equity-based plans | 2.6 |  |  | (2.9) |  |  | 5.5 | 2.6 |
Dividends | (20.6) |  |  |  |  | (20.6) |  | (20.6) |
Ending balance at May. 31, 2021 | 1,182.3 | $ 0.4 | $ 0.0 | 626.5 | (34.7) | 916.4 | (327.8) | 1,180.8 | 1.5
Ending balance (in shares) at May. 31, 2021 |  | 32.7 | 1.7 |  |  |  |  |  |
Pension and postretirement adjustments, tax portion | 2.2 |  |  |  |  |  |  |  |
Net Income (loss) | 81.0 |  |  |  |  | 80.9 |  | 80.9 | 0.1
Foreign currency translation adjustment | (14.5) |  |  |  | (14.5) |  |  | (14.5) |
Pension and post-retirement adjustments (net of tax of $0.4) | 3.8 |  |  |  | 3.8 |  |  | 3.8 |
Stock-based compensation | 7.8 |  |  | 7.8 |  |  |  | 7.8 |
Proceeds from issuance of common stock pursuant to stock-based compensation plans | 10.4 |  |  | 10.4 |  |  |  | 10.4 |
Purchases of treasury stock at cost (in shares) |  | (0.9) |  |  |  |  |  |  |
Purchases of treasury stock at cost | (33.4) |  |  |  |  |  | (33.4) | (33.4) |
Treasury stock issued pursuant to stock purchase plans (in shares) |  | 0.7 |  |  |  |  |  |  |
Treasury stock issued pursuant to equity-based plans | 2.0 |  |  | (17.7) |  |  | 19.7 | 2.0 |
Dividends | (20.8) |  |  |  |  | (20.8) |  | (20.8) |
Noncontrolling Interest, Period Increase (Decrease) |  |  | $ (0.2) |  |  |  |  |  |
Ending balance at May. 31, 2022 | 1,218.4 | $ 0.4 | $ 0.0 | $ 627.0 | $ (45.4) | $ 976.5 | $ (341.5) | $ 1,217.0 | $ 1.4
Ending balance (in shares) at May. 31, 2022 |  | 32.5 | 1.7 |  |  |  |  |  |
Pension and postretirement adjustments, tax portion | $ 0.3 |  |  |  |  |  |  |  |

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