XML 46 R35.htm IDEA: XBRL DOCUMENT v3.10.0.1

EQUITY (Details) - Subsequent Event [Member]	3 Months Ended
	Sep. 30, 2018 $ / shares
Common Stock, Dividends, Per Share, Declared	$ 0.46
Common Stock, Dividends, Declared, Annualized Basis	$ 1.84

X

- Definition

Dividends declared during the period for each share of common stock outstanding, on an annualized basis.

+ References

No definition available.

+ Details

Name:	ogs_CommonStockDividendsDeclaredAnnualizedBasis
Namespace Prefix:	ogs_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: