PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - Pension plan assets measured at fair value (Details) - Pensions - USD ($) $ in Millions | 12 Months Ended | | |
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total pension plan assets, percent | 98.50% | | |
U.S. | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | $ 371.4 | $ 377.3 | $ 517.5 |
U.S. | Fair value, measurements, recurring | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 371.4 | 377.3 | |
U.S. | Fair value, measurements, recurring | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 6.4 | 36.9 | |
U.S. | Fair value, measurements, recurring | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 86.2 | | |
U.S. | Fair value, measurements, recurring | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 1.4 | 67 | |
U.S. | Fair value, measurements, recurring | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 76.3 | 28.4 | |
U.S. | Fair value, measurements, recurring | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 195.3 | 108.8 | |
U.S. | Fair value, measurements, recurring | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 5.8 | 136.2 | |
U.S. | Fair value, measurements, recurring | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 1 | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 94 | 103.9 | |
U.S. | Fair value, measurements, recurring | Level 1 | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 6.4 | 36.9 | |
U.S. | Fair value, measurements, recurring | Level 1 | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 86.2 | | |
U.S. | Fair value, measurements, recurring | Level 1 | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 1.4 | 67 | |
U.S. | Fair value, measurements, recurring | Level 1 | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 1 | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 1 | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 1 | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 1 | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
U.S. | Fair value, measurements, recurring | Level 2 | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 2 | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
U.S. | Fair value, measurements, recurring | Level 3 | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Level 3 | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 277.4 | 273.4 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
U.S. | Fair value, measurements, recurring | Net Asset Value | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 76.3 | 28.4 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 195.3 | 108.8 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 5.8 | 136.2 | |
U.S. | Fair value, measurements, recurring | Net Asset Value | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 394 | 372 | $ 627.5 |
International | Fair value, measurements, recurring | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 394 | 372 | |
International | Fair value, measurements, recurring | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 10.6 | 49.4 | |
International | Fair value, measurements, recurring | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
International | Fair value, measurements, recurring | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 5.1 | 9.1 | |
International | Fair value, measurements, recurring | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 46.7 | 42.7 | |
International | Fair value, measurements, recurring | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 279.2 | 220.4 | |
International | Fair value, measurements, recurring | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 2.4 | 2.3 | |
International | Fair value, measurements, recurring | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 50 | 48.1 | |
International | Fair value, measurements, recurring | Level 1 | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 65.7 | 106.6 | |
International | Fair value, measurements, recurring | Level 1 | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 10.6 | 49.4 | |
International | Fair value, measurements, recurring | Level 1 | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
International | Fair value, measurements, recurring | Level 1 | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 1 | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 5.1 | 9.1 | |
International | Fair value, measurements, recurring | Level 1 | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 1 | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 1 | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 1 | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 50 | 48.1 | |
International | Fair value, measurements, recurring | Level 2 | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 2 | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 2 | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
International | Fair value, measurements, recurring | Level 2 | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 2 | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 2 | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 2 | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 2 | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 2 | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
International | Fair value, measurements, recurring | Level 3 | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Level 3 | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Net Asset Value | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 328.3 | 265.4 | |
International | Fair value, measurements, recurring | Net Asset Value | Cash and cash equivalents | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Net Asset Value | Current receivable | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | | |
International | Fair value, measurements, recurring | Net Asset Value | U.S. companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Net Asset Value | International companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 0 | 0 | |
International | Fair value, measurements, recurring | Net Asset Value | Registered investment companies | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 46.7 | 42.7 | |
International | Fair value, measurements, recurring | Net Asset Value | Hedge funds | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 279.2 | 220.4 | |
International | Fair value, measurements, recurring | Net Asset Value | Limited partnerships | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | 2.4 | 2.3 | |
International | Fair value, measurements, recurring | Net Asset Value | Real estate and other investments | | | |
Pension and Other Postretirement Benefit Plans Disclosure [Line Items] | | | |
Total plan assets | $ 0 | $ 0 | |