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Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |
Beginning balance | $ 1,414.4 | $ 1,435.1 | $ 1,395.1 | $ 1,280.5 | $ 1,265.5 | $ 1,270.3 | $ 1,395.1 | $ 1,270.3
Other comprehensive income (loss) before reclassifications | (11.8) |  |  | (33.3) |  |  | (0.2) | (62.1)
Amounts reclassified from accumulated other comprehensive income (loss) | 0.3 |  |  | 0.2 |  |  | 0.9 | 0.4
Net current-period other comprehensive loss |  |  |  | (33.1) |  |  |  | (61.7)
Less: other comprehensive income attributable to redeemable non-controlling interests |  |  |  | (1.8) |  |  |  | (3.8)
Net current-period other comprehensive income attributable to EnPro Industries, Inc. | (11.5) | 5.1 | 7.1 | (31.3) | (14.9) | (11.7) | 0.7 | (57.9)
Ending balance | 1,407.9 | 1,414.4 | 1,435.1 | 1,267.8 | 1,280.5 | 1,265.5 | 1,407.9 | 1,267.8
Total |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |
Beginning balance | (21.1) | (26.2) | (33.3) | (12.0) | 2.9 | 14.6 | (33.3) | 14.6
Net current-period other comprehensive income attributable to EnPro Industries, Inc. | (11.5) | 5.1 | 7.1 | (31.3) | (14.9) | (11.7) |  |
Ending balance | (32.6) | (21.1) | (26.2) | (43.3) | (12.0) | 2.9 | (32.6) | (43.3)
Unrealized Translation Adjustments |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |
Beginning balance | 23.4 |  | 11.8 | 19.9 |  | 46.7 | 11.8 | 46.7
Other comprehensive income (loss) before reclassifications | (11.8) |  |  | (33.3) |  |  | (0.2) | (62.1)
Amounts reclassified from accumulated other comprehensive income (loss) | 0.0 |  |  | 0.0 |  |  | 0.0 | 0.0
Net current-period other comprehensive loss |  |  |  | (33.3) |  |  |  | (62.1)
Less: other comprehensive income attributable to redeemable non-controlling interests |  |  |  | (1.8) |  |  |  | (3.8)
Net current-period other comprehensive income attributable to EnPro Industries, Inc. | (11.8) |  |  | (31.5) |  |  | (0.2) | (58.3)
Ending balance | 11.6 | 23.4 |  | (11.6) | 19.9 |  | 11.6 | (11.6)
Pension and Other Postretirement Plans |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |
Beginning balance | (44.5) |  | $ (45.1) | (31.9) |  | $ (32.1) | (45.1) | (32.1)
Other comprehensive income (loss) before reclassifications | 0.0 |  |  | 0.0 |  |  | 0.0 | 0.0
Amounts reclassified from accumulated other comprehensive income (loss) | 0.3 |  |  | 0.2 |  |  | 0.9 | 0.4
Net current-period other comprehensive loss |  |  |  | 0.2 |  |  |  | 0.4
Less: other comprehensive income attributable to redeemable non-controlling interests |  |  |  | 0.0 |  |  |  | 0.0
Net current-period other comprehensive income attributable to EnPro Industries, Inc. | 0.3 |  |  | 0.2 |  |  | 0.9 | 0.4
Ending balance | $ (44.2) | $ (44.5) |  | $ (31.7) | $ (31.9) |  | $ (44.2) | $ (31.7)

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