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RETIREMENT PLANS - Fair Value of Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Pension | United States |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | $ 2,372.9 | $ 2,292.9 | $ 1,981.4
Pension | International |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 1,104.0 | 1,014.2 |
Investments measured at NAV | 44.0 | 12.9 |
Total | 1,148.0 | 1,027.1 | $ 925.6
Pension | International | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 26.9 | 28.5 |
Total | 26.9 | 28.5 |
Pension | International | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 1,077.1 | 985.7 |
Total | 1,077.1 | 985.7 |
Pension | International | Level 3 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 0.0 |
Pension | International | Cash |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 11.0 | 7.7 |
Pension | International | Cash | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 11.0 | 7.7 |
Pension | International | International equity |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 467.0 | 418.1 |
Pension | International | International equity | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 467.0 | 418.1 |
Pension | International | Corporate bonds |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 227.7 | 215.8 |
Pension | International | Corporate bonds | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 9.1 | 8.2 |
Pension | International | Corporate bonds | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 218.6 | 207.6 |
Pension | International | Government bonds |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 248.7 | 228.4 |
Pension | International | Government bonds | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 6.8 | 12.6 |
Pension | International | Government bonds | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 241.9 | 215.8 |
Pension | International | Insurance company accounts |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 149.6 | 144.2 |
Pension | International | Insurance company accounts | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 149.6 | 144.2 |
Pension and Postretirement Health Care Benefit Plans | United States |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 1,711.8 | 1,911.1 |
Total | 2,378.7 | 2,299.0 |
Pension and Postretirement Health Care Benefit Plans | United States | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 1,217.2 | 1,910.8 |
Total | 1,217.2 | 1,910.8 |
Pension and Postretirement Health Care Benefit Plans | United States | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 494.6 | 0.3 |
Total | 494.6 | 0.3 |
Pension and Postretirement Health Care Benefit Plans | United States | Level 3 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 0.0 | 0.0 |
Pension and Postretirement Health Care Benefit Plans | United States | Cash |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 38.3 | 13.2 |
Pension and Postretirement Health Care Benefit Plans | United States | Cash | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 38.3 | 13.2 |
Pension and Postretirement Health Care Benefit Plans | United States | Large cap equity |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 610.0 | 785.9 |
Pension and Postretirement Health Care Benefit Plans | United States | Large cap equity | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 610.0 | 785.9 |
Pension and Postretirement Health Care Benefit Plans | United States | Small cap equity |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 104.8 | 201.7 |
Pension and Postretirement Health Care Benefit Plans | United States | Small cap equity | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 36.5 | 201.7 |
Pension and Postretirement Health Care Benefit Plans | United States | Small cap equity | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 68.3 |  |
Pension and Postretirement Health Care Benefit Plans | United States | International equity |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 138.7 | 350.4 |
Investments measured at NAV | 666.9 | 387.9 |
Pension and Postretirement Health Care Benefit Plans | United States | International equity | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 95.8 | 350.4 |
Pension and Postretirement Health Care Benefit Plans | United States | International equity | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 42.9 |  |
Pension and Postretirement Health Care Benefit Plans | United States | Core fixed income |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 688.1 | 410.0 |
Pension and Postretirement Health Care Benefit Plans | United States | Core fixed income | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 360.3 | 410.0 |
Pension and Postretirement Health Care Benefit Plans | United States | Core fixed income | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 327.8 |  |
Pension and Postretirement Health Care Benefit Plans | United States | High-yield bonds |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 76.3 | 107.9 |
Pension and Postretirement Health Care Benefit Plans | United States | High-yield bonds | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 76.3 | 107.9 |
Pension and Postretirement Health Care Benefit Plans | United States | Emerging markets |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | 55.6 | 41.7 |
Pension and Postretirement Health Care Benefit Plans | United States | Emerging markets | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value |  | 41.7 |
Pension and Postretirement Health Care Benefit Plans | United States | Emerging markets | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value | $ 55.6 |  |
Pension and Postretirement Health Care Benefit Plans | United States | Insurance company accounts |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value |  | 0.3 |
Pension and Postretirement Health Care Benefit Plans | United States | Insurance company accounts | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Total investments at fair value |  | $ 0.3 |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date, excluding assets measured at net asset value. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References No definition available. + Details
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