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Consolidated Statements of Stockholders' Equity - 6 months ended Jun. 30, 2017 - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Paid-In Capital | Treasury Stock | Accumulated Deficit | Accumulated Other Comprehensive Loss | Noncontrolling Interests | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2016 |  | 183.2 |  |  |  |  |  |
Balance at Dec. 31, 2016 | $ 1,473.0 | $ 1.8 | $ 1,844.9 | $ (5.3) | $ (303.8) | $ (174.8) | $ 110.2 | $ 1,473.0
Net income (loss) | 131.8 |  |  |  |  |  |  | 131.8
Net Income (Loss) Attributable to Parent | 127.3 | 0.0 | 0.0 | 0.0 | 127.3 | 0.0 |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest |  |  |  |  |  |  | 4.5 |
Other comprehensive income | 26.0 | 0.0 | 0.0 | 0.0 | 0.0 | 23.7 | 2.3 | 26.0
Distributions to noncontrolling interest |  | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (0.3) | (0.3)
Stock-based compensation |  | $ 0.0 | 15.2 | 0.0 | 0.0 | 0.0 | 0.0 | 15.2
Employee share purchase plan |  | 0.1 |  |  |  |  |  |
Employee share purchase plan |  | $ 0.0 | 3.4 | 0.0 | 0.0 | 0.0 | 0.0 | 3.4
Exercise of stock options |  | 2.1 |  |  |  |  |  |
Exercise of stock options |  | $ 0.1 | 13.3 | 0.0 | 0.0 | 0.0 | 0.0 | 13.4
Treasury stock purchased |  | (3.5) |  |  |  |  |  |
Treasury stock purchased |  | $ 0.0 | 0.0 | (133.5) | 0.0 | 0.0 | 0.0 | (133.5)
Purchase of noncontrolling interest |  | $ 0.0 | (41.4) |  |  |  | (17.3) | (58.7)
Balance (in shares) at Jun. 30, 2017 |  | 181.9 |  |  |  |  |  |
Balance at Jun. 30, 2017 | $ 1,470.3 | $ 1.9 | $ 1,835.4 | $ (138.8) | $ (176.5) | $ (151.1) | $ 99.4 | $ 1,470.3

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