3 year credit agreement

No definition available.

Name:	scg_A3YearCreditAgreement
Namespace Prefix:	scg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the maximum term of borrowings under a commercial paper program.

+ References

No definition available.

+ Details

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

- Definition

Represents each bank's portion of the credit facilities as a percentage of the aggregate credit facilities.

+ References

No definition available.

+ Details

Name:	scg_LineOfCreditFacilityPercentageOfCreditFacilitiesProvidedByEachBank
Namespace Prefix:	scg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of other banks that lend or provide the remaining portion of the aggregate credit facilities.

+ References

No definition available.

+ Details

Name:	scg_NumberOfOtherBanks
Namespace Prefix:	scg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a)(3))

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-Name Accounting Standards Codification

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

+ Details

Name:	us-gaap_CommercialPaper
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

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-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amounts due within 1 year (or 1 business cycle) from other related parties which are not otherwise stated in the taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

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-Paragraph 1

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-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3(a)(2))

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-Name Accounting Standards Codification

-Topic 235

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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-Subparagraph (SX 210.5-02.19(a))

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-Number 210

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+ Details

Name:	us-gaap_DueToAffiliateCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from amounts received from a long-term debt instrument secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date within one year where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

+ References

+ Details

Name:	us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_BankOfAmericaNaMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_MorganStanlyBankNaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_BBTBankDomain
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=exch_CRED
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_WellsFargoNationalAssociationBankofAmericaMorganStanleyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_JpmorganChaseBankNaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_MizuhoCorporateBankLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_TdBankNaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_UbsLoanFinanceLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_DeutscheBankAgNewYorkBranchMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_UnionBankNaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_UsBankNationalAssociationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_TwootherbanksDomain
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=scg_JPMorganChaseMizuhoCorpTDBankCreditSuisseAGCaymanIslandsBranchandUBSLoanFinanceMember
Namespace Prefix:
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Balance Type:
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- Details

Name:	dei_LegalEntityAxis=scg_ScegMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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LONG-TERM AND SHORT-TERM DEBT (Details 2) - USD ($) $ in Millions	3 Months Ended	6 Months Ended		9 Months Ended
	Mar. 31, 2015	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Lines of credit:
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,800.0
Commercial Paper Maximum Term				270
Number of other banks (in entities)				2
Debt Instrument, Interest Rate Terms	0.077	.051
Bank of America, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				10.70%
Morgan Stanly Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				10.70%
BB&T Bank [Domain]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
CREDIT SUISSE (US) [Member]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
Credit Suisse AG, Cayman Islands Branch (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				10.70%
JPMorgan Chase Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
Mizuho Corporate Bank, Ltd (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
TD Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
UBS Loan Finance LLC (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
Deutsche Bank AG New York Branch [Member] [Member]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.30%
Union Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.30%
US Bank National Association (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.30%
Two other banks [Domain]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.00%
JP Morgan Chase, Mizuho Corp, TD Bank, Credit Suisse AG ,Cayman Islands Branch and UBS Loan Finance [Member]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
SCEG
Debt Instrument [Line Items]
Proceeds from Issuance of First Mortgage Bond		$ 500.0	$ 300.0
Due to Affiliate, Current				$ 125.0	$ 180.0
Debt Instruments [Abstract]
Face value of Industrial Revenue Bonds issued, proceeds of which were availed as loan				67.8
Lines of credit:
Line of Credit Facility, Maximum Borrowing Capacity				1,200.0
3 year credit agreement				200.0
Related Party Transaction, Due from (to) Related Party, Current				$ 41.2	83.0
Due from Other Related Parties, Current					80.0
Debt Instrument, Interest Rate Terms		0.051	.045
SCEG \| Bank of America, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				10.70%
SCEG \| Morgan Stanly Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				10.70%
SCEG \| CREDIT SUISSE (US) [Member]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
SCEG \| Credit Suisse AG, Cayman Islands Branch (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				10.70%
SCEG \| JPMorgan Chase Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
SCEG \| Mizuho Corporate Bank, Ltd (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
SCEG \| TD Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
SCEG \| UBS Loan Finance LLC (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%
SCEG \| Deutsche Bank AG New York Branch [Member] [Member]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.30%
SCEG \| Union Bank, N.A. (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.30%
SCEG \| US Bank National Association (Member)
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.30%
SCEG \| Two other banks [Domain]
Lines of credit:
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				6.00%
Parent Company [Member]
Lines of credit:
Line of Credit Facility, Maximum Borrowing Capacity				$ 300.0	300.0
Commercial Paper				$ 14.0	$ 179.0
Commercial paper, weighted average interest rate (as a percent)				0.66%	0.54%
Letters of credit supported by LOC				$ (3.0)	$ (3.0)
Line of Credit Facility, Remaining Borrowing Capacity				283.0	118.0
SCE&G (including Fuel Company)
Lines of credit:
Line of Credit Facility, Maximum Borrowing Capacity				1,400.0	1,400.0
Commercial Paper				$ 234.0	$ 709.0
Commercial paper, weighted average interest rate (as a percent)				0.44%	0.52%
Letters of credit supported by LOC				$ (0.3)	$ (0.3)
Line of Credit Facility, Remaining Borrowing Capacity				1,166.0	691.0
3 year credit agreement		$ 200.0
Long-term Line of Credit		$ 1,400.0
Fuel Company
Lines of credit:
Line of Credit Facility, Maximum Borrowing Capacity				500.0
PSNC Energy
Lines of credit:
Line of Credit Facility, Maximum Borrowing Capacity				100.0	100.0
Commercial Paper				16.0	$ 30.0
Commercial paper, weighted average interest rate (as a percent)					0.65%
Letters of credit supported by LOC				0.0	$ 0.0
Line of Credit Facility, Remaining Borrowing Capacity				$ 84.0	$ 70.0