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COMMITMENTS AND CONTINGENCIES Environmental Matters Textuals (Details) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) site | Dec. 31, 2019 USD ($) | Jun. 30, 2019 USD ($)
Site Contingency [Line Items] |  |  |
Environmental-related assets | $ 20.4 | $ 22.2 | $ 23.6
Qualified Settlement Fund [Member] |  |  |
Site Contingency [Line Items] |  |  |
Deferred Income | 7.2 |  |
Amortization of Deferred Gains | 7.2 |  |
Qualified Settlement Fund [Member] | Discontinued Operations [Member] |  |  |
Site Contingency [Line Items] |  |  |
Amortization of Deferred Gains | $ 1.3 |  |
Environmental Related Matters [Member] |  |  |
Site Contingency [Line Items] |  |  |
Number Of Active Environmental Investigation And Remediation Sites | site | 26 |  |
Maximum [Member] | Environmental Related Matters [Member] |  |  |
Site Contingency [Line Items] |  |  |
Loss Contingency, Range of Possible Loss, Maximum | $ 105.3 |  |

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