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Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions | Total | Common Stock | Additional Paid-In Capital | Deferred Compensation Equity | Accumulated Other Comprehensive Income (loss) | Retained Earnings | Shares in Treasury
--- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |
Adoption of accounting standards | Adjustments for New Accounting Pronouncement |  | $ 6.5 |  |  |  | $ (6.5) | $ 13.0 |
Balance at the beginning of the period at Dec. 31, 2017 |  | 2,528.3 | $ 78.7 | $ 353.7 | $ 10.4 | (85.7) | 2,820.8 | $ (649.6)
Balance (in shares) at Dec. 31, 2017 |  |  | 61,800,000 |  |  |  |  | 16,600,000
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |
Net income |  | 309.6 |  |  |  |  | 309.6 |
Other comprehensive income (loss), net of tax |  | 23.3 |  |  |  | 23.3 |  |
Cash dividends - $0.40 and $0.37 for the three months ended March 31, 2019 and 2018, respectively |  | (23.1) |  |  |  |  | (23.1) |
Repurchases of common stock |  | (129.3) |  |  |  |  |  | $ (129.3)
Repurchases of common stock (in shares) |  |  | (1,200,000) |  |  |  |  | 1,200,000
Issuances and deferrals. net for stock based compensation (1) | [1] | 5.5 |  | 3.9 | 0.7 |  |  | $ 0.9
Issuances and deferrals, net for stock based compensation (in shares) | [1] |  | 100,000 |  |  |  |  | (100,000)
Balance at the end of the period at Mar. 31, 2018 |  | 2,720.8 | $ 78.7 | 357.6 | 11.1 | (68.9) | 3,120.3 | $ (778.0)
Balance (in shares) at Mar. 31, 2018 |  |  | 60,700,000 |  |  |  |  | 17,700,000
Balance at the beginning of the period at Dec. 31, 2018 |  | $ 2,597.4 | $ 78.7 | 383.8 | $ 8.0 | (122.1) | 3,351.4 | $ (1,102.4)
Balance (in shares) at Dec. 31, 2018 |  | 57,957,912 | 57,900,000 |  |  |  |  | 20,500,000
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |
Net income |  | $ 79.4 |  |  |  |  | 79.4 |
Other comprehensive income (loss), net of tax |  | 6.2 |  |  |  | 6.2 |  |
Cash dividends - $0.40 and $0.37 for the three months ended March 31, 2019 and 2018, respectively |  | (23.3) |  |  |  |  | (23.3) |
Repurchases of common stock |  | (149.9) |  |  |  |  |  | $ (149.9)
Repurchases of common stock (in shares) |  |  | (1,300,000) |  |  |  |  | 1,300,000
Issuances and deferrals. net for stock based compensation (1) | [1] | 14.9 |  | 6.3 |  |  |  | $ 8.8
Issuances and deferrals, net for stock based compensation (in shares) | [1] |  | 200,000 |  | (200,000) |  |  | (200,000)
Balance at the end of the period at Mar. 31, 2019 |  | $ 2,524.7 | $ 78.7 | $ 390.1 | $ 7.8 | $ (115.9) | $ 3,407.5 | $ (1,243.5)
Balance (in shares) at Mar. 31, 2019 |  | 56,802,175 | 56,800,000 |  |  |  |  | 21,600,000
[1] | Issuances and deferrals, net for stock based compensation reflects share activity related to option exercises, restricted and performance shares vested and net issuances and deferrals associated with deferred compensation equity.

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