XML 43 R29.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Basis of Presentation (Tables) | 12 Months Ended
--- | ---
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of asset retirement obligation | The activities and balances for ARO are as follows (in millions):
| Balance at Beginning of Period |  | Liabilities Incurred |  | Liabilities Settled |  | Accretion Expense |  | Revisions to Estimates |  | Balance at End of Period
Year ended June 30, 2018 | $ | 3.6 |  |  | $ | 0.7 |  |  | $ | (0.2 | ) |  | $ | 0.1 |  |  | $ | (0.5 | ) |  | $ | 3.7 |
Year ended July 1, 2017 | $ | 3.7 |  |  | $ | 0.1 |  |  | $ | (0.1 | ) |  | $ | 0.2 |  |  | $ | (0.3 | ) |  | $ | 3.6 |

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration