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v3.23.3

Reclassifications out of Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance |  |  | $ 1,038.0 |
Other comprehensive income before reclassifications |  |  | (1.8) | $ (37.1)
Amounts reclassified from AOCL |  |  | (0.9) | 0.7
Total other comprehensive income/(loss) | $ (8.2) | $ (16.2) | (2.7) | (36.4)
Ending Balance | 1,125.4 |  | 1,125.4 |
Accumulated Other Comprehensive Loss [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance |  |  | (145.2) | (46.9)
Ending Balance | (147.9) | (83.3) | (147.9) | (83.3)
Defined Benefit Pension Plan Items [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance |  |  | (58.4) | 10.7
Other comprehensive income before reclassifications |  |  | 0.0 | 0.0
Amounts reclassified from AOCL |  |  | (0.9) | 0.7
Total other comprehensive income/(loss) |  |  | (0.9) | 0.7
Ending Balance | (59.3) | 11.4 | (59.3) | 11.4
Foreign Currency Translation Items [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance |  |  | (86.8) | (57.6)
Other comprehensive income before reclassifications |  |  | (1.8) | (37.1)
Amounts reclassified from AOCL |  |  | 0.0 | 0.0
Total other comprehensive income/(loss) |  |  | (1.8) | (37.1)
Ending Balance | $ (88.6) | $ (94.7) | $ (88.6) | $ (94.7)

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