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v3.23.2

Reclassifications out of Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance |  |  | $ 1,038.0 |
Other comprehensive income before reclassifications |  |  | 6.1 | $ (20.7)
Amounts reclassified from AOCL |  |  | (0.6) | 0.5
Total other comprehensive income/(loss) | $ 1.1 | $ (16.6) | 5.5 | (20.2)
Ending Balance | 1,092.2 |  | 1,092.2 |
Accumulated Other Comprehensive Loss [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance |  |  | (145.2) | (46.9)
Ending Balance | (139.7) | (67.1) | (139.7) | (67.1)
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 |  |  | (0.6) | 0.5
Total other comprehensive income/(loss) |  |  | (0.6) | 0.5
Ending Balance | (59.0) | 11.2 | (59.0) | 11.2
Foreign Currency Translation Items [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance |  |  | (86.8) | (57.6)
Other comprehensive income before reclassifications |  |  | 6.1 | (20.7)
Amounts reclassified from AOCL |  |  | 0.0 | 0.0
Total other comprehensive income/(loss) |  |  | 6.1 | (20.7)
Ending Balance | $ (80.7) | $ (78.3) | $ (80.7) | $ (78.3)

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