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Segment information - Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Revenues: |  |  |  |  |
Total revenues | $ 254.7 | $ 337.9 | $ 555.1 | $ 502.2 |
Cost of sales or services: |  |  |  |  |
Cost of goods and services sold | 296.1 | 190.6 | 440.7 | 343.5 |
Gross margin | $ (48.0) | $ 140.7 | $ 99.8 | $ 145.6 |
Gross margin % | (19.00%) | 42.00% | 18.00% | 30.00% |
Segment adjusted gross margin | $ 65.4 | $ 143.0 | $ 213.4 | $ 150.2 |
Reconciling items: |  |  |  |  |
Segment restructuring costs | (17.1) | 0.1 | (16.6) | (9.6) |
Segment inventory step-up provision | 0.0 | (1.9) | 0.0 | (1.9) |
Changes in fair value of contingent consideration | (0.1) | (0.4) | (0.6) | (0.7) |
Settlement charge, net | (110.2) | 0.0 | (110.2) | 0.0 |
Impairment of long-lived assets | (27.2) | (306.7) | (27.2) | (306.7) |
Research and development | (32.7) | (26.0) | (47.8) | (66.7) |
Selling, general and administrative | (85.9) | (91.4) | (170.6) | (192.7) |
Amortization of intangible assets | (16.3) | (16.1) | (32.5) | (33.1) |
Interest expense | (23.6) | (28.6) | (47.9) | (46.5) |
Gain (loss) on sale of business and assets held for sale | (40.0) | 74.9 | (40.0) | 74.9 | $ 74.2
Other, net | (2.7) | (3.6) | (6.1) | 1.3 |
Loss before income taxes | (269.8) | (250.2) | (257.7) | (410.8) |
Operating Segments |  |  |  |  |
Revenues: |  |  |  |  |
Revenue | 248.1 | 331.3 | 540.5 | 489.1 |
Reconciling items: |  |  |  |  |
Segment restructuring costs | (3.1) | 0.0 | (2.8) | (2.0) |
Contracts and grants |  |  |  |  |
Revenues: |  |  |  |  |
Revenue | 6.6 | 6.6 | 14.6 | 13.1 |
Reconciling items: |  |  |  |  |
Contracts and grants revenue | 6.6 | 6.6 | 14.6 | 13.1 |
Contracts and grants | Contracts and grants revenue |  |  |  |  |
Revenues: |  |  |  |  |
Revenue | 6.6 | 6.6 | 14.6 | 13.1 |
Reconciling items: |  |  |  |  |
Contracts and grants revenue | 6.6 | 6.6 | 14.6 | 13.1 |
Commercial Products |  |  |  |  |
Cost of sales or services: |  |  |  |  |
Cost of goods and services sold | 53.4 | 54.4 | 105.5 | 100.2 |
Gross margin | $ 66.6 | $ 83.5 | $ 133.0 | $ 143.9 |
Gross margin % | 56.00% | 61.00% | 56.00% | 59.00% |
Segment adjusted gross margin | $ 66.6 | $ 83.5 | $ 133.0 | $ 143.9 |
Commercial Products | Operating Segments |  |  |  |  |
Revenues: |  |  |  |  |
Revenue | 120.0 | 137.9 | 238.5 | 244.1 |
Reconciling items: |  |  |  |  |
Contracts and grants revenue | 120.0 | 137.9 | 238.5 | 244.1 |
Segment restructuring costs | 0.0 | 0.0 | 0.0 | 0.0 |
MCM Products |  |  |  |  |
Cost of sales or services: |  |  |  |  |
Cost of goods and services sold | 31.1 | 80.5 | 93.3 | 135.9 |
Gross margin | $ 32.3 | $ 83.8 | $ 125.5 | $ 65.6 |
Gross margin % | 51.00% | 51.00% | 57.00% | 33.00% |
Segment adjusted gross margin | $ 35.1 | $ 86.1 | $ 128.7 | $ 70.2 |
MCM Products | Operating Segments |  |  |  |  |
Revenues: |  |  |  |  |
Revenue | 63.4 | 164.3 | 218.8 | 201.5 |
Reconciling items: |  |  |  |  |
Contracts and grants revenue | 63.4 | 164.3 | 218.8 | 201.5 |
Segment restructuring costs | (2.7) | 0.0 | (2.6) | (2.0) |
Services |  |  |  |  |
Cost of sales or services: |  |  |  |  |
Cost of goods and services sold | 211.6 | 55.7 | 241.9 | 107.4 |
Gross margin | $ (146.9) | $ (26.6) | $ (158.7) | $ (63.9) |
Gross margin % | (227.00%) | (91.00%) | (191.00%) | (147.00%) |
Segment adjusted gross margin | $ (36.3) | $ (26.6) | $ (48.3) | $ (63.9) |
Services | Operating Segments |  |  |  |  |
Revenues: |  |  |  |  |
Revenue | 64.7 | 29.1 | 83.2 | 43.5 |
Reconciling items: |  |  |  |  |
Segment restructuring costs | $ (0.4) | $ 0.0 | $ (0.2) | $ 0.0 |

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