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Revenue Major Geographical Area (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Total revenues: |  |  |  |
Total revenue | $ 2,438.1 | $ 2,297.5 | $ 7,319.5 | $ 6,858.4
Net revenue | 2,061.4 | 1,895.7 | 6,192.1 | 5,617.9
United States |  |  |  |
Total revenues: |  |  |  |
Total revenue | 1,550.9 | 1,407.1 | 4,681.1 | 4,203.5
Net revenue | 1,313.0 | 1,160.9 | 3,964.8 | 3,424.7
United Kingdom |  |  |  |
Total revenues: |  |  |  |
Total revenue | 201.9 | 220.9 | 617.9 | 626.9
Net revenue | 172.1 | 174.0 | 522.8 | 513.2
Continental Europe |  |  |  |
Total revenues: |  |  |  |
Total revenue | 177.6 | 177.5 | 565.8 | 564.3
Net revenue | 155.7 | 152.0 | 495.8 | 489.4
Asia Pacific |  |  |  |
Total revenues: |  |  |  |
Total revenue | 262.7 | 267.3 | 753.3 | 803.0
Net revenue | 205.0 | 210.6 | 588.1 | 603.6
Latin America |  |  |  |
Total revenues: |  |  |  |
Total revenue | 109.2 | 95.3 | 300.3 | 267.8
Net revenue | 97.8 | 84.0 | 270.2 | 239.9
Other |  |  |  |
Total revenues: |  |  |  |
Total revenue | 135.8 | 129.4 | 401.1 | 392.9
Net revenue | 117.8 | 114.2 | 350.4 | 347.1
International |  |  |  |
Total revenues: |  |  |  |
Total revenue | 887.2 | 890.4 | 2,638.4 | 2,654.9
Net revenue | 748.4 | 734.8 | 2,227.3 | 2,193.2
IAN |  |  |  |
Total revenues: |  |  |  |
Total revenue | 1,903.9 | 1,774.7 | 5,744.7 | 5,272.7
Net revenue | 1,743.9 | 1,580.5 | 5,260.9 | 4,690.9
IAN | United States |  |  |  |
Total revenues: |  |  |  |
Total revenue | 1,185.3 | 1,064.2 | 3,611.2 | 3,150.6
Net revenue | 1,103.0 | 952.9 | 3,354.0 | 2,814.2
IAN | International |  |  |  |
Total revenues: |  |  |  |
Total revenue | 718.6 | 710.5 | 2,133.5 | 2,122.1
Net revenue | 640.9 | 627.6 | 1,906.9 | 1,876.7
CMG |  |  |  |
Total revenues: |  |  |  |
Total revenue | 534.2 | 522.8 | 1,574.8 | 1,585.7
Net revenue | 317.5 | 315.2 | 931.2 | 927.0
CMG | United States |  |  |  |
Total revenues: |  |  |  |
Total revenue | 365.6 | 342.9 | 1,069.9 | 1,052.9
Net revenue | 210.0 | 208.0 | 610.8 | 610.5
CMG | International |  |  |  |
Total revenues: |  |  |  |
Total revenue | 168.6 | 179.9 | 504.9 | 532.8
Net revenue | $ 107.5 | $ 107.2 | $ 320.4 | $ 316.5

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