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INFORMATION ON REPORTABLE SEGMENTS (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) country | Jul. 01, 2017 USD ($) | Jun. 30, 2018 USD ($) country segment | Jul. 01, 2017 USD ($)
Information on reportable segments and other operating segments |  |  |  |
Number of reportable segments | segment |  |  | 3 |
Revenues: |  |  |  |
Revenues | $ 379.2 | $ 349.7 | $ 731.1 | $ 690.3
Income (loss): |  |  |  |
Consolidated operating income | 22.7 | 5.2 | 42.0 | 24.3
Pension and postretirement expense |  |  | (3.8) | (7.5)
Special charges, net | (1.6) | (0.5) | (3.6) | (1.0)
Reportable and other operating segments |  |  |  |
Income (loss): |  |  |  |
Consolidated operating income | 41.0 | 20.7 | 78.0 | 55.0
Corporate |  |  |  |
Income (loss): |  |  |  |
Corporate expense | (12.5) | (11.3) | (24.3) | (22.7)
Special charges, net | 0.0 | 0.0 | (0.4) | (0.1)
Segment Reconciling Items |  |  |  |
Income (loss): |  |  |  |
Long-term incentive compensation expense | (4.2) | (3.6) | (8.1) | (6.8)
Pension and postretirement expense | 0.0 | (0.1) | 0.0 | (0.2)
Special charges, net | (1.6) | (0.5) | (3.6) | (1.0)
HVAC segment |  |  |  |
Revenues: |  |  |  |
Revenues | 139.7 | 120.3 | 267.4 | 230.4
Income (loss): |  |  |  |
Special charges, net | 0.0 | (0.3) | 0.0 | (0.4)
HVAC segment | Reportable and other operating segments |  |  |  |
Income (loss): |  |  |  |
Consolidated operating income | 18.5 | 15.4 | 37.1 | 31.9
Detection and Measurement segment |  |  |  |
Revenues: |  |  |  |
Revenues | 74.6 | 64.5 | 140.2 | 118.1
Income (loss): |  |  |  |
Special charges, net | 0.0 | 0.0 | 0.0 | (0.3)
Detection and Measurement segment | Reportable and other operating segments |  |  |  |
Income (loss): |  |  |  |
Consolidated operating income | 16.5 | 17.3 | 32.2 | 28.5
Engineered Solutions segment |  |  |  |
Revenues: |  |  |  |
Revenues | 164.9 | 164.9 | 323.5 | 341.8
Income (loss): |  |  |  |
Special charges, net | (1.6) | (0.2) | (3.2) | (0.2)
Engineered Solutions segment | Reportable and other operating segments |  |  |  |
Income (loss): |  |  |  |
Consolidated operating income | $ 6.0 | (12.0) | $ 8.7 | $ (5.4)
Minimum |  |  |  |
Information on reportable segments and other operating segments |  |  |  |
Number of countries in which entity operates (over 15 countries) | country | 14 |  | 14 |
Number of countries in which entity sells its products and services (over 100 countries) | country | 100 |  | 100 |
SOUTH AFRICA | Large Power Projects | Contracts Accounted for under Percentage of Completion | Engineered Solutions segment | Reportable and other operating segments |  |  |  |
Revenues: |  |  |  |
Revenues |  | (13.5) |  |
Income (loss): |  |  |  |
Consolidated operating income |  | $ (22.9) |  |

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