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INFORMATION ON REPORTABLE SEGMENTS - Financial Data (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Oct. 01, 2022 | Sep. 30, 2023 | Oct. 01, 2022
Revenues: |  |  |  |
Revenues | $ 448,700,000 | $ 370,500,000 | $ 1,271,800,000 | $ 1,031,600,000
Income: |  |  |  |
Consolidated operating income | 57,700,000 | 37,300,000 | 158,800,000 | 75,900,000
Acquisition-related and other costs | 2,900,000 |  | 5,000,000.0 |
Amortization of intangible assets | 14,600,000 | 6,700,000 | 32,400,000 | 23,100,000
Special charges, net | 0 | 0 | 0 | 100,000
Other operating expense, net | 0 | 0 | 0 | 1,000,000.0
ASPEQ Parent Holdings, Inc. |  |  |  |
Income: |  |  |  |
Acquisition-related and other costs |  |  | 5,100,000 |
Amortization of intangible assets | 6,700,000 |  | 9,400,000 |
ITL |  |  |  |
Income: |  |  |  |
Acquisition-related and other costs |  | 100,000 |  | 1,100,000
Step-Up of Inventory | ASPEQ Parent Holdings, Inc. | Cost of Sales |  |  |  |
Income: |  |  |  |
Acquisition-related and other costs | 2,500,000 |  | 3,600,000 |
Step-Up of Inventory | ITL | Cost of Sales |  |  |  |
Income: |  |  |  |
Acquisition-related and other costs |  | 100,000 |  | 1,100,000
HVAC reportable segment |  |  |  |
Revenues: |  |  |  |
Revenues | 289,200,000 | 227,800,000 | 809,800,000 | 639,600,000
Detection and Measurement reportable segment |  |  |  |
Revenues: |  |  |  |
Revenues | 159,500,000 | 142,700,000 | 462,000,000.0 | 392,000,000.0
Operating Segments |  |  |  |
Revenues: |  |  |  |
Revenues | 448,700,000 | 370,500,000 | 1,271,800,000 | 1,031,600,000
Income: |  |  |  |
Consolidated operating income | 91,600,000 | 63,400,000 | 250,400,000 | 159,100,000
Operating Segments | HVAC reportable segment |  |  |  |
Revenues: |  |  |  |
Revenues | 289,200,000 | 227,800,000 | 809,800,000 | 639,600,000
Income: |  |  |  |
Consolidated operating income | 58,300,000 | 33,100,000 | 161,200,000 | 82,000,000.0
Special charges, net |  | 0 |  | 100,000
Operating Segments | Detection and Measurement reportable segment |  |  |  |
Revenues: |  |  |  |
Revenues | 159,500,000 | 142,700,000 | 462,000,000.0 | 392,000,000.0
Income: |  |  |  |
Consolidated operating income | 33,300,000 | 30,300,000 | 89,200,000 | 77,100,000
Special charges, net |  | 0 |  | 0
Corporate expense |  |  |  |
Income: |  |  |  |
Corporate expense | 13,000,000.0 | 17,200,000 | 44,200,000 | 50,200,000
Segment Reconciling Items |  |  |  |
Income: |  |  |  |
Acquisition-related and other costs | 2,900,000 | 100,000 | 5,000,000.0 | 1,100,000
Long-term incentive compensation expense | 3,400,000 | 2,100,000 | 10,000,000.0 | 7,700,000
Amortization of intangible assets | 14,600,000 | 6,700,000 | 32,400,000 | 23,100,000
Special charges, net | 0 | 0 | 0 | 100,000
Other operating expense, net | $ 0 | $ 0 | $ 0 | $ 1,000,000.0

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