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Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Preferred Stock | Common Stock | Additional Paid-In Capital | Retained Earnings (Accumulated Deficit) | Accumulated Other Comprehensive Loss, Net of Tax | Treasury Stock | Total IPG Stockholders' Equity | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 2,456.6 | $ 221.5 | $ 48.8 | $ 2,465.4 | $ 738.3 | $ (288.0) | $ (765.4) | $ 2,420.6 | $ 36.0
Balance, shares at Dec. 31, 2012 |  |  | 492.0 |  |  |  |  |  |
Net income | 288.9 |  |  |  | 267.9 |  |  | 267.9 | 21.0
Other comprehensive loss | (127.1) |  |  |  |  | (123.2) |  | (123.2) | (3.9)
Reclassifications related to redeemable noncontrolling interests | (4.4) |  |  | 0.2 |  |  |  | 0.2 | (4.6)
Noncontrolling interest transactions | 1.0 |  |  | (0.1) |  |  |  | (0.1) | 1.1
Distributions to noncontrolling interests | (14.9) |  |  |  |  |  |  |  | (14.9)
Change in redemption value of redeemable noncontrolling interests | (6.2) |  |  |  | (6.2) |  |  | (6.2) |
Repurchase of common stock | (481.8) |  |  |  |  |  | (481.8) | (481.8) |
Common stock dividends | (126.0) |  |  |  | (126.0) |  |  | (126.0) |
Preferred stock dividends | (8.7) |  |  |  | (8.7) |  |  | (8.7) |
Conversion of convertible notes to common stock, shares |  |  | 16.9 |  |  |  |  |  |
Conversion of convertible notes to common stock | 200.0 |  | $ 1.7 | 198.3 |  |  |  | 200.0 |
Capped call transaction | 0.0 |  |  | 19.1 |  |  | (19.1) | 0.0 |
Conversion of preferred stock to common stock, shares |  | (221.5) | 17.3 |  |  |  |  |  |
Conversion of preferred stock to common stock | 0.0 |  | $ 1.7 | 219.8 |  |  |  | 0.0 |
Stock-based compensation, shares |  |  | 2.4 |  |  |  |  |  |
Stock-based compensation, Value | 43.6 |  | $ 0.5 | 43.1 |  |  |  | 43.6 |
Exercise of stock options, shares |  |  | 5.2 |  |  |  |  |  |
Exercise of stock options, Value | 47.9 |  | $ 0.5 | 47.4 |  |  |  | 47.9 |
Shares withheld for taxes, shares |  |  | (1.5) |  |  |  |  |  |
Shares withheld for taxes, Value | (20.1) |  | $ (0.2) | (19.9) |  |  |  | (20.1) |
Other | 2.0 |  |  | 1.9 | (0.8) |  |  | 1.1 | 0.9
Balance, shares at Dec. 31, 2013 |  |  | 532.3 |  |  |  |  |  |
Balance at Dec. 31, 2013 | 2,250.8 | $ 0.0 | $ 53.0 | 2,975.2 | 864.5 | (411.2) | (1,266.3) | 2,215.2 | 35.6
Net income | 505.4 |  |  |  | 477.1 |  |  | 477.1 | 28.3
Other comprehensive loss | (228.1) |  |  |  |  | (225.5) |  | (225.5) | (2.6)
Reclassifications related to redeemable noncontrolling interests | (7.7) |  |  | (3.5) |  |  |  | (3.5) | (4.2)
Noncontrolling interest transactions | (2.3) |  |  | 2.1 |  |  |  | 2.1 | (4.4)
Distributions to noncontrolling interests | (17.0) |  |  |  |  |  |  |  | (17.0)
Change in redemption value of redeemable noncontrolling interests | 1.5 |  |  |  | 1.5 |  |  | 1.5 |
Repurchase of common stock | (275.1) |  |  |  |  |  | (275.1) | (275.1) |
Retirement of treasury stock, shares |  |  | (121.9) |  |  |  |  |  |
Retirement of treasury stock | 0.0 |  | $ (12.2) | (1,510.2) |  |  | 1,522.4 | 0.0 |
Common stock dividends | (159.0) |  |  |  | (159.0) |  |  | (159.0) |
Stock-based compensation, shares |  |  | 3.4 |  |  |  |  |  |
Stock-based compensation, Value | 63.8 |  | $ 0.3 | 63.5 |  |  |  | 63.8 |
Exercise of stock options, shares |  |  | 1.7 |  |  |  |  |  |
Exercise of stock options, Value | 20.3 |  | $ 0.2 | 20.1 |  |  |  | 20.3 |
Shares withheld for taxes, shares |  |  | (0.9) |  |  |  |  |  |
Shares withheld for taxes, Value | (15.0) |  | $ (0.1) | (14.9) |  |  |  | (15.0) |
Excess tax benefit from stock-based compensation | 15.2 |  |  | 15.2 |  |  |  | 15.2 |
Other | (1.6) |  |  |  | (0.8) |  |  | (0.8) | (0.8)
Balance, shares at Dec. 31, 2014 |  |  | 414.6 |  |  |  |  |  |
Balance at Dec. 31, 2014 | 2,151.2 | 0.0 | $ 41.2 | 1,547.5 | 1,183.3 | (636.7) | (19.0) | 2,116.3 | 34.9
Net income | 480.5 |  |  |  | 454.6 |  |  | 454.6 | 25.9
Other comprehensive loss | (213.1) |  |  |  |  | (208.9) |  | (208.9) | (4.2)
Reclassifications related to redeemable noncontrolling interests | (6.0) |  |  |  |  |  |  |  | (6.0)
Noncontrolling interest transactions | 1.2 |  |  |  |  |  |  |  | 1.2
Distributions to noncontrolling interests | (15.9) |  |  |  |  |  |  |  | (15.9)
Change in redemption value of redeemable noncontrolling interests | (3.9) |  |  |  | (3.9) |  |  | (3.9) |
Repurchase of common stock | (285.2) |  |  |  |  |  | (285.2) | (285.2) |
Retirement of treasury stock, shares |  |  | (11.3) |  |  |  |  |  |
Retirement of treasury stock | 0.0 |  | $ (1.2) | (232.0) |  |  | 233.2 | 0.0 |
Common stock dividends | (195.5) |  |  |  | (195.5) |  |  | (195.5) |
Stock-based compensation, shares |  |  | 2.5 |  |  |  |  |  |
Stock-based compensation, Value | 83.4 |  | $ 0.3 | 83.1 |  |  |  | 83.4 |
Exercise of stock options, shares |  |  | 1.3 |  |  |  |  |  |
Exercise of stock options, Value | 13.7 |  | $ 0.2 | 13.5 |  |  |  | 13.7 |
Shares withheld for taxes, shares |  |  | (0.8) |  |  |  |  |  |
Shares withheld for taxes, Value | (17.8) |  | $ (0.1) | (17.7) |  |  |  | (17.8) |
Excess tax benefit from stock-based compensation | 10.2 |  |  | 10.2 |  |  |  | 10.2 |
Other | (1.0) |  |  | (0.5) | (0.9) |  |  | (1.4) | 0.4
Balance, shares at Dec. 31, 2015 |  |  | 406.3 |  |  |  |  |  |
Balance at Dec. 31, 2015 | $ 2,001.8 | $ 0.0 | $ 40.4 | $ 1,404.1 | $ 1,437.6 | $ (845.6) | $ (71.0) | $ 1,965.5 | $ 36.3

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