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Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Retained Earnings | Accumulated Other Comprehensive Loss | Noncontrolling Interest
--- | --- | --- | --- | --- | ---
Shares outstanding, beginning (in shares) at Dec. 31, 2016 |  | 49.5 |  |  |
Shareholders' equity, beginning at Dec. 31, 2016 | $ 685.0 | $ 116.5 | $ 569.7 | $ (1.2) | $ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 140.5 |  | 140.5 |  |
Issuance of common stock (in shares) |  | 0.1 |  |  |
Issuance of common stock | 2.1 | $ 2.1 |  |  |
Repurchase of common stock (in shares) |  | (3.4) |  |  |
Repurchase of common stock | (180.9) | $ (138.4) | (42.5) |  |
Taxes paid related to net share settlement of stock awards (in shares) |  | (0.2) |  |  |
Taxes paid related to net share settlement of stock awards | (10.0) |  | (10.0) |  |
Issuance of restricted stock awards, net of forfeitures (in shares) |  | 0.2 |  |  |
Stock-based compensation | 27.1 | $ 27.1 |  |  |
Cash dividends | (23.4) |  | (23.4) |  |
Foreign currency translation, net of tax | (0.1) |  |  | (0.1) |
Change in pension benefits, net of tax | 0.0 |  |  |  |
Shares outstanding, ending (in shares) at Dec. 31, 2017 |  | 46.2 |  |  |
Shareholders' equity, ending at Dec. 31, 2017 | 640.3 | $ 7.3 | 634.3 | (1.3) | 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Adoption of ASC | 29.7 |  | 29.7 |  |
Net income | 352.8 |  | 352.8 |  |
Issuance of common stock (in shares) |  | 0.3 |  |  |
Issuance of common stock | 1.5 | $ 1.5 |  |  |
Repurchase of common stock (in shares) |  | (6.1) |  |  |
Repurchase of common stock | (533.9) | $ (29.9) | (504.0) |  |
Taxes paid related to net share settlement of stock awards (in shares) |  | (0.1) |  |  |
Taxes paid related to net share settlement of stock awards | (15.6) |  | (15.6) |  |
Issuance of restricted stock awards, net of forfeitures (in shares) |  | 0.1 |  |  |
Stock-based compensation | 21.1 | $ 21.1 |  |  |
Cash dividends | (23.0) |  | (23.0) |  |
Foreign currency translation, net of tax | 0.6 |  |  | 0.6 |
Change in pension benefits, net of tax | (0.2) |  |  | (0.2) |
Shares outstanding, ending (in shares) at Dec. 31, 2018 |  | 40.4 |  |  |
Shareholders' equity, ending at Dec. 31, 2018 | 473.3 | $ 0.0 | 474.2 | (0.9) | 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Adoption of ASC | (0.3) |  | (0.3) |  |
Net income | 137.2 |  | 137.5 |  | (0.3)
Contributions from noncontrolling interest | 3.0 |  |  |  | 3.0
Issuance of common stock (in shares) |  | 0.2 |  |  |
Issuance of common stock | 1.9 | $ 1.9 |  |  |
Repurchase of common stock (in shares) |  | (0.9) |  |  |
Repurchase of common stock | (93.0) | $ (25.7) | (67.3) |  |
Taxes paid related to net share settlement of stock awards (in shares) |  | (0.1) |  |  |
Taxes paid related to net share settlement of stock awards | (11.5) |  | (11.5) |  |
Issuance of restricted stock awards, net of forfeitures (in shares) |  | 0.1 |  |  |
Stock-based compensation | 23.8 | $ 23.8 |  |  |
Cash dividends | (23.4) |  | (23.4) |  |
Foreign currency translation, net of tax | 0.0 |  |  |  |
Change in pension benefits, net of tax | 0.0 |  |  |  |
Shares outstanding, ending (in shares) at Dec. 31, 2019 |  | 39.7 |  |  |
Shareholders' equity, ending at Dec. 31, 2019 | $ 511.0 | $ 0.0 | $ 509.2 | $ (0.9) | $ 2.7

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