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Subsequent Event (Details) $ in Millions	3 Months Ended
	Dec. 31, 2018 USD ($)
Scenario, Forecast [Member]
Bankruptcy Claims, Amount of Claims Filed	$ 314

X

- Definition

Amount of bankruptcy claim filed with bankruptcy court.

+ References

No definition available.

+ Details

Name:	us-gaap_BankruptcyClaimsAmountOfClaimsFiled
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: