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OTHER CONTINGENCIES AND GUARANTEES (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2017
Loss Contingencies [Line Items] |  |  |
Liability for aggregate future remediation costs | $ 28 | $ 28 |
Letter of credit | 9 |  |
Letter of credit, amount outstanding | 0 |  |
Alameda County, California Matter |  |  |
Loss Contingencies [Line Items] |  |  |
Liability for aggregate future remediation costs | $ 14 | 14 | $ 14
Remediation period | 30 years |  |
Maximum undiscounted costs | $ 28 |  |
Dickinson County, Michigan Matter |  |  |
Loss Contingencies [Line Items] |  |  |
Liability for aggregate future remediation costs | $ 12 | $ 12 |
Remediation period | 30 years |  |
Percentage of liability for aggregate remediation and associated costs, other than legal fees | 24.30% |  |

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- Definition Maximum potential amount of future payments (undiscounted) that the Company could incur over an estimated remediation period. + References No definition available. + Details
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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 + Details
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