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v3.19.3

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions | Total | Common stock | Additional paid-in capital | Retained earnings | Accumulated other comprehensive income (loss)
--- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2017 |  | $ 2.9 | $ 8.5 | $ 2,110.6 | $ (25.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock options exercised |  |  | 11.3 |  |
Purchases of common stock |  |  | (16.2) | (24.2) |
Stock-based compensation |  |  | 3.8 |  |
Net earnings | $ 583.1 |  |  | 583.1 |
Dividends paid in cash |  |  |  | (327.5) |
Other comprehensive income (loss) |  |  |  |  | (11.6)
Balance at end of period at Sep. 30, 2018 | $ 2,315.6 | 2.9 | 7.4 | 2,342.0 | (36.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cash dividends paid per share of common stock (in dollars per share) | $ 0.57 |  |  |  |
Balance at beginning of period at Dec. 31, 2017 |  | 2.9 | 8.5 | 2,110.6 | (25.1)
Balance at end of period at Dec. 31, 2018 | $ 2,302.7 | 2.9 | 3.0 | 2,341.6 | (44.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cash dividends paid per share of common stock (in dollars per share) | $ 0.770 |  |  |  |
Balance at beginning of period at Jun. 30, 2018 |  | 2.9 | 0.4 | 2,259.2 | (35.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock options exercised |  |  | 5.7 |  |
Purchases of common stock |  |  | 0.0 | 0.0 |
Stock-based compensation |  |  | 1.3 |  |
Net earnings | $ 197.6 |  |  | 197.6 |
Dividends paid in cash |  |  |  | (114.8) |
Other comprehensive income (loss) |  |  |  |  | (0.8)
Balance at end of period at Sep. 30, 2018 | $ 2,315.6 | 2.9 | 7.4 | 2,342.0 | (36.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cash dividends paid per share of common stock (in dollars per share) | $ 0.200 |  |  |  |
Balance at end of period at Dec. 31, 2018 | $ 2,302.7 | 2.9 | 3.0 | 2,341.6 | (44.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cash dividends paid per share of common stock (in dollars per share) | $ 0.200 |  |  |  |
Stock options exercised |  |  | 43.0 |  |
Purchases of common stock |  |  | 0.0 | 0.0 |
Stock-based compensation |  |  | 4.3 |  |
Net earnings | $ 612.2 |  |  | 612.2 |
Dividends paid in cash |  |  |  | (372.3) |
Other comprehensive income (loss) |  |  |  |  | (4.2)
Balance at end of period at Sep. 30, 2019 | $ 2,585.7 | 2.9 | 50.3 | 2,581.5 | (49.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cash dividends paid per share of common stock (in dollars per share) | $ 0.65 |  |  |  |
Balance at beginning of period at Jun. 30, 2019 |  | 2.9 | 46.0 | 2,494.2 | (39.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock options exercised |  |  | 2.9 |  |
Purchases of common stock |  |  | 0.0 | 0.0 |
Stock-based compensation |  |  | 1.4 |  |
Net earnings | $ 213.5 |  |  | 213.5 |
Dividends paid in cash |  |  |  | (126.2) |
Other comprehensive income (loss) |  |  |  |  | (9.6)
Balance at end of period at Sep. 30, 2019 | $ 2,585.7 | $ 2.9 | $ 50.3 | $ 2,581.5 | $ (49.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cash dividends paid per share of common stock (in dollars per share) | $ 0.220 |  |  |  |

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