v3.10.0.1

RATE AND OTHER REGULATORY MATTERS NARRATIVE (Details)	12 Months Ended
	Dec. 31, 2018
Asset Retirement Obligation Costs [Member]
Regulatory Asset, Amortization Period	106 years
PSNC Energy [Member]
MPG environmental remediation	3.8

X

- Definition

MPG environmental remediation

+ References

No definition available.

+ Details

Name:	scg_MPGenvironmentalremediation
Namespace Prefix:	scg_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_RegulatoryAssetAmortizationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RegulatoryAssetAxis=us-gaap_AssetRetirementObligationCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=scg_PsncEnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: