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Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Loss by Components (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income      
Beginning balance $ 1,395.1 $ 1,270.3 $ 1,081.4
Other comprehensive loss before reclassifications 10.3 (52.5) 6.3
Amounts reclassified from accumulated other comprehensive loss 0.8 1.2 13.6
Other comprehensive income (loss), net of tax 11.1 (51.3) 19.9
Less: other comprehensive income (loss) attributable to non-controlling interests 0.0 (3.4) 0.4
Other comprehensive income (loss), net of tax attributable to Enpro Inc. 11.1 (47.9) 19.5
Ending balance 1,409.7 1,395.1 1,270.3
Total      
Accumulated Other Comprehensive Income      
Beginning balance (33.3) 14.6 (4.9)
Other comprehensive income (loss), net of tax attributable to Enpro Inc. 11.1 (47.9) 19.5
Ending balance (22.2) (33.3) 14.6
Unrealized Translation Adjustments      
Accumulated Other Comprehensive Income      
Beginning balance 11.8 46.7 31.7
Other comprehensive loss before reclassifications 12.3 (39.7) 2.5
Amounts reclassified from accumulated other comprehensive loss 0.0 1.4 12.9
Other comprehensive income (loss), net of tax 12.3 (38.3) 15.4
Less: other comprehensive income (loss) attributable to non-controlling interests 0.0 (3.4) 0.4
Other comprehensive income (loss), net of tax attributable to Enpro Inc. 12.3 (34.9) 15.0
Ending balance 24.1 11.8 46.7
Pension and Other Postretirement Plans      
Accumulated Other Comprehensive Income      
Beginning balance (45.1) (32.1) (36.6)
Other comprehensive loss before reclassifications (2.0) (12.8) 3.8
Amounts reclassified from accumulated other comprehensive loss 0.8 (0.2) 0.7
Other comprehensive income (loss), net of tax (1.2) (13.0) 4.5
Less: other comprehensive income (loss) attributable to non-controlling interests 0.0 0.0 0.0
Other comprehensive income (loss), net of tax attributable to Enpro Inc. (1.2) (13.0) 4.5
Ending balance $ (46.3) $ (45.1) $ (32.1)