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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions | Total | Common Class A | Common Stock | Capital in Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 |  | $ 132.2 | $ 164.2 | $ 451.9 | $ 1,135.5 | $ (272.0) | $ (230.5)
Conversion of Class A Common Stock |  | (0.4) | 0.2 | 0.2 |  |  |
Foreign currency translation adjustments | $ (42.7) |  |  |  |  | (42.7) |
Net earnings | 282.9 |  |  |  | 282.9 |  |
Issuance of share units |  |  |  | (4.2) |  |  |
Unrealized net (loss) gain on cash flow derivative instruments, less related income tax benefit (provision) of $0.7 in 2017, $0.6 in 2016 and $(0.2) in 2015 | 0.3 |  |  |  |  | 0.3 |
Cash dividends on stock |  |  |  |  | (67.7) |  |
Vesting of share units |  |  |  | (3.2) |  |  | 3.2
Change in pension liability less related income tax (provision) benefit of $(7.5) in 2017, $5.7 in 2016 and $(0.5) in 2015 | 1.0 |  |  |  |  | 1.0 |
Stock based compensation expense |  |  |  | 8.1 |  |  |
Exercise of stock options |  |  |  | 1.1 |  |  | (5.2)
Tax benefit from exercises of stock options and vesting of share units |  |  |  | 10.4 |  |  |
Stock incentives and directors' compensation |  |  |  | 5.0 |  |  | 0.1
Shares repurchased | (128.1) |  |  |  |  |  | (128.1)
Balance at Dec. 31, 2015 | 1,442.3 | 131.8 | 164.4 | 469.3 | 1,350.7 | (313.4) | (360.5)
Conversion of Class A Common Stock |  | (0.2) |  | 0.2 |  |  |
Foreign currency translation adjustments | (39.8) |  |  |  |  | (39.8) |
Net earnings | 326.5 |  |  |  | 326.5 |  |
Issuance of share units |  |  |  | (4.6) |  |  |
Unrealized net (loss) gain on cash flow derivative instruments, less related income tax benefit (provision) of $0.7 in 2017, $0.6 in 2016 and $(0.2) in 2015 | (1.0) |  |  |  |  | (1.0) |
Cash dividends on stock |  |  |  |  | (84.2) |  |
Vesting of share units |  |  |  | (2.0) |  |  | 3.4
Change in pension liability less related income tax (provision) benefit of $(7.5) in 2017, $5.7 in 2016 and $(0.5) in 2015 | (9.0) |  |  |  |  | (9.0) |
Stock based compensation expense |  |  |  | 8.8 |  |  |
Exercise of stock options |  |  |  | 0.3 |  |  | 4.0
Stock incentives and directors' compensation |  |  |  | 5.6 |  |  | 0.2
Shares repurchased | (135.2) |  |  |  |  |  | (135.2)
Balance at Dec. 31, 2016 | 1,515.3 | 131.6 | 164.4 | 477.6 | 1,593.0 | (363.2) | (488.1)
Conversion of Class A Common Stock |  | (0.4) | 0.1 | 0.3 |  |  |
Foreign currency translation adjustments | 52.7 |  |  |  |  | 52.7 |
Net earnings | 296.5 |  |  |  | 296.5 |  |
Issuance of share units |  |  |  | (4.9) |  |  |
Unrealized net (loss) gain on cash flow derivative instruments, less related income tax benefit (provision) of $0.7 in 2017, $0.6 in 2016 and $(0.2) in 2015 | (1.1) |  |  |  |  | (1.1) |
Cash dividends on stock |  |  |  |  | (96.9) |  |
Vesting of share units |  |  |  | (2.9) |  |  | 2.9
Change in pension liability less related income tax (provision) benefit of $(7.5) in 2017, $5.7 in 2016 and $(0.5) in 2015 | 12.1 |  |  |  |  | 12.1 |
Stock based compensation expense |  |  |  | 9.2 |  |  |
Exercise of stock options |  |  |  | 1.4 |  |  | (2.4)
Stock incentives and directors' compensation |  |  |  | 5.8 |  |  | 0.2
Shares repurchased | (139.1) |  |  |  |  |  | (139.1)
Balance at Dec. 31, 2017 | $ 1,648.8 | $ 131.2 | $ 164.5 | $ 486.5 | $ 1,792.6 | $ (299.5) | $ (626.5)

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