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v3.19.3

Segment Reporting (Segment Reporting Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenues: |  |  |  |  |
Revenues |  | $ 1,002.7 | $ 906.4 | $ 2,898.7 | $ 2,470.1
Gross Profit: |  |  |  |  |
Total Gross Profit |  | 291.4 | 270.1 | 840.5 | 751.7
Operating Income (Loss): |  |  |  |  |
Total Operating Income |  | 90.9 | 74.2 | 226.9 | 185.6
Amortization of Intangible Assets |  | 11.9 | 18.6 | 38.8 | 44.7
Apex |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 644.1 | 589.6 | 1,878.7 | 1,695.7
Gross Profit: |  |  |  |  |
Total Gross Profit |  | 192.2 | 177.8 | 555.4 | 506.1
Operating Income (Loss): |  |  |  |  |
Total Operating Income |  | 79.2 | 71.4 | 213.1 | 192.6
Amortization of Intangible Assets |  | 4.0 | 6.6 | 15.5 | 19.7
Oxford |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 152.5 | 152.8 | 455.3 | 455.3
Gross Profit: |  |  |  |  |
Total Gross Profit |  | 61.9 | 62.7 | 183.3 | 187.3
Operating Income (Loss): |  |  |  |  |
Total Operating Income |  | 13.6 | 15.2 | 36.3 | 39.8
Amortization of Intangible Assets |  | 1.0 | 1.0 | 3.0 | 3.1
ECS |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 206.1 | 164.0 | 564.7 | 319.1
Gross Profit: |  |  |  |  |
Total Gross Profit |  | 37.3 | 29.6 | 101.8 | 58.3
Operating Income (Loss): |  |  |  |  |
Total Operating Income |  | 12.7 | 4.3 | 30.5 | 8.0
Amortization of Intangible Assets |  | 6.9 | 11.0 | 20.3 | 21.9
Corporate |  |  |  |  |
Operating Income (Loss): |  |  |  |  |
Total Operating Income | [1] | (14.6) | (16.7) | (53.0) | (54.8)
Assignment | Apex |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 629.8 | 575.2 | 1,835.0 | 1,653.8
Assignment | Oxford |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 130.3 | 130.4 | 391.1 | 386.1
Permanent Placement | Apex |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 14.3 | 14.4 | 43.7 | 41.9
Permanent Placement | Oxford |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 22.2 | 22.4 | 64.2 | 69.2
Fixed-price Contract | ECS |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 64.4 | 48.2 | 153.8 | 93.0
Time and materials Contract | ECS |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 68.4 | 42.1 | 200.6 | 91.1
Cost-plus-fixed-fee Contract | ECS |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | $ 73.3 | $ 73.7 | $ 210.3 | $ 135.0
[1] | Parent company operating expenses consisting of consolidated stock-based compensation expense, compensation for corporate employees, acquisition, integration and strategic planning expenses, public company expenses and depreciation expense for corporate assets.

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