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Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions | Total | Common Stock | Additional Paid-In Capital | Deferred Compensation Equity | Accumulated Other Comprehensive Income (loss). | Retained Earnings | Shares in Treasury
--- | --- | --- | --- | --- | --- | --- | ---
Balance at the beginning of the period at Dec. 31, 2014 | $ 2,205.0 | $ 78.7 | $ 247.8 | $ 6.0 | $ (61.8) | $ 2,134.4 | $ (200.1)
Balance (in shares) at Dec. 31, 2014 |  | 64,691,059 |  |  |  |  | 13,723,201
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |
Net income | 319.7 |  |  |  |  | 319.7 |
Other comprehensive income (loss), net of tax | (25.3) |  |  |  | (25.3) |  |
Cash dividends - $1.10, $1.30 and $1.44 per share for the years ended 2014, 2015 and 2016, respectively | (72.3) |  |  |  |  | (72.3) |
Repurchases of common stock | (137.2) |  |  |  |  |  | $ (137.2)
Repurchases of common stock (in Shares) |  | (1,496,411) |  |  |  |  | 1,496,411
Issuance and deferrals, net for stock based compensation (1) | 57.5 |  | 45.6 | 2.0 |  |  | $ 9.9
Issuance and deferrals, net for stock based compensation (in shares) |  | 856,952 |  |  |  |  | (836,371)
Balance at the end of the period at Dec. 31, 2015 | 2,347.4 | $ 78.7 | 293.4 | 8.0 | (87.1) | 2,381.8 | $ (327.4)
Balance (in shares) at Dec. 31, 2015 |  | 64,051,600 |  |  |  |  | 14,383,241
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |
Net income | 250.1 |  |  |  |  | 250.1 |
Other comprehensive income (loss), net of tax | (35.1) |  |  |  | (35.1) |  |
Cash dividends - $1.10, $1.30 and $1.44 per share for the years ended 2014, 2015 and 2016, respectively | (84.5) |  |  |  |  | (84.5) |
Repurchases of common stock | (75.7) |  |  |  |  |  | $ (75.7)
Repurchases of common stock (in Shares) |  | (782,057) |  |  |  |  | 782,057
Issuance and deferrals, net for stock based compensation (1) | 64.7 |  | 41.9 | 2.3 |  |  | $ 20.5
Issuance and deferrals, net for stock based compensation (in shares) |  | 987,639 |  |  |  |  | (986,497)
Balance at the end of the period at Dec. 31, 2016 | $ 2,466.9 | $ 78.7 | 335.3 | 10.3 | (122.2) | 2,547.4 | $ (382.6)
Balance (in shares) at Dec. 31, 2016 | 64,257,182 | 64,257,182 |  |  |  |  | 14,178,801
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |
Net income | $ 365.5 |  |  |  |  | 365.5 |
Other comprehensive income (loss), net of tax | 36.5 |  |  |  | 36.5 |  |
Cash dividends - $1.10, $1.30 and $1.44 per share for the years ended 2014, 2015 and 2016, respectively | (92.1) |  |  |  |  | (92.1) |
Repurchases of common stock | (268.4) |  |  |  |  |  | $ (268.4)
Repurchases of common stock (in Shares) |  | (2,719,538) |  |  |  |  | 2,719,538
Issuance and deferrals, net for stock based compensation (1) | 19.9 |  | 18.4 | 0.1 |  |  | $ 1.4
Issuance and deferrals, net for stock based compensation (in shares) |  | 302,090 |  |  |  |  | (285,146)
Balance at the end 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 | 61,839,734 | 61,839,734 |  |  |  |  | 16,613,193

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