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v3.3.1.900

Results by Quarter (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 2,196.2 |  | $ 1,865.5 |  | $ 1,876.1 | $ 1,676.0 | $ 2,207.1 |  | $ 1,841.1 | $ 1,851.4 |  | $ 1,637.5 | $ 7,613.8 | $ 7,537.1 | $ 7,122.3
Salaries and related expenses | 1,235.1 |  | 1,202.2 |  | 1,205.2 | 1,215.2 | 1,266.4 |  | 1,195.2 | 1,170.2 |  | 1,188.6 | 4,857.7 | 4,820.4 | 4,545.5
Office and general expenses | 504.7 |  | 472.1 |  | 455.1 | 453.1 | 507.6 |  | 474.7 | 484.7 |  | 461.1 | 1,885.0 | 1,928.1 | 1,917.9
Restructuring and other reorganization-related (reversals) charges, net | 0.0 |  | (0.7) |  | 0.0 | (0.1) | 0.1 |  | (0.1) | 0.7 |  | (0.5) | (0.8) | 0.2 | 60.6
Operating income (loss) | 456.4 |  | 191.9 |  | 215.8 | 7.8 | 433.0 |  | 171.3 | 195.8 |  | (11.7) | (871.9) | (788.4) | (598.3)
Other income (expense), net | 10.3 | [1] | 37.2 | [1] | (0.5) | (0.3) | 0.1 |  | 0.6 | 11.2 | [1] | (1.7) | 46.7 | 10.2 | 32.3
Total (expenses) and other income | (28.6) | [1] | (52.9) | [1] | (14.8) | (13.4) | (14.4) |  | 13.8 | (27.2) | [1] | (12.3) | 109.7 | 67.7 | 130.3
(Benefit of) provision for income taxes | 145.4 |  | 61.1 |  | 77.7 | (1.4) | 87.9 | [2] | 65.0 | 65.3 |  | (1.7) | 282.8 | 216.5 | 181.2
Net (loss) income | (282.9) |  | (78.0) |  | (123.8) | 4.2 | (331.3) |  | (92.8) | (103.7) |  | 22.4 | (480.5) | (505.4) | (288.9)
Net (loss) income available to IPG common stockholders | $ 260.3 |  | $ 74.9 |  | $ 121.2 | $ (1.8) | $ 308.9 | [2] | $ 89.7 | $ 99.4 |  | $ (20.9) | $ 454.6 | $ 477.1 | $ 259.2
Dividends declared per common share | $ 0.120 |  | $ 0.120 |  | $ 0.120 | $ 0.120 | $ 0.095 |  | $ 0.095 | $ 0.095 |  | $ 0.095 | $ 0.48 | $ 0.38 | $ 0.30
Basic earnings per share | 0.65 |  | 0.18 |  | 0.30 | 0.00 | 0.75 |  | 0.21 | 0.24 |  | (0.05) | 1.11 | 1.14 | 0.62
Diluted earnings per share | $ 0.63 |  | $ 0.18 |  | $ 0.29 | $ 0.00 | $ 0.73 |  | $ 0.21 | $ 0.23 |  | $ (0.05) | $ 1.09 | $ 1.12 | $ 0.61
[1] | The three months ended December 31, 2015 included pre-tax losses of $12.0 on sales of businesses. The three months ended September 30, 2015 included pre-tax losses of $38.0 on sales of businesses. The three months ended June 30, 2014 included a pre-tax loss of $10.4 related to our early extinguishment of debt.
[2] | The three months ended December 31, 2014 included a tax benefit of $67.6 due to the net reversal of valuation allowances on deferred tax assets in Continental Europe.

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