DISPOSITIONS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Proceeds from sale of CGT and SCI net of transaction costs	$ 625
Public Utilities, Property, Plant and Equipment, Net		12,232.0	11,643.0
Nonutility Property and Investments, Net		472.0scg_NonutilityPropertyAndInvestmentsNet	504.0scg_NonutilityPropertyAndInvestmentsNet
Assets, Current		2,145.0us-gaap_AssetsCurrent	1,421.0us-gaap_AssetsCurrent
Regulated Entity, Other Assets, Noncurrent		2,003.0	1,596.0
Disposal group current assets held for sale		341.0	0
Liabilities, Current		2,533.0us-gaap_LiabilitiesCurrent	1,442.0us-gaap_LiabilitiesCurrent
Liabilities, Noncurrent		3,801.0us-gaap_LiabilitiesNoncurrent	3,663.0us-gaap_LiabilitiesNoncurrent
Liabilities held for sale		52.0scg_Disposalgroupliabilitiesheldforsale	0scg_Disposalgroupliabilitiesheldforsale
Estimated pre-tax gain on sale of CGT and SCI	350
Liabilities, Held for Sale [Member] \| CGT [Member]
Liabilities, Current		3.5
Liabilities, Noncurrent		42.9
Liabilities held for sale		46.4
Liabilities, Held for Sale [Member] \| SCANA Communications [Member]
Liabilities, Current		2.2
Liabilities, Noncurrent		3.1
Liabilities held for sale		5.3
Liabilities, Held for Sale [Member] \| Held for Sale, CGT and SCI [Member]
Liabilities, Current		5.7
Liabilities, Noncurrent		46.0
Liabilities held for sale		51.7
Assets Held-for-sale [Member] \| CGT [Member]
Public Utilities, Property, Plant and Equipment, Net		288.4
Nonutility Property and Investments, Net		0.6
Assets, Current		6.5
Regulated Entity, Other Assets, Noncurrent		0.9
Disposal group current assets held for sale		296.4
Assets Held-for-sale [Member] \| SCANA Communications [Member]
Public Utilities, Property, Plant and Equipment, Net		0
Nonutility Property and Investments, Net		40.1
Assets, Current		3.9
Regulated Entity, Other Assets, Noncurrent		0.2
Disposal group current assets held for sale		44.2
Assets Held-for-sale [Member] \| Held for Sale, CGT and SCI [Member]
Public Utilities, Property, Plant and Equipment, Net		288.4
Nonutility Property and Investments, Net		40.7
Assets, Current		10.4
Regulated Entity, Other Assets, Noncurrent		1.1
Disposal group current assets held for sale		$ 340.6

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Disposal group liabilities held for sale

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- Definition

Estimated pre-tax gain on sale of CGT and SCI

+ References

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Amount representing the nonutility properties and investments as of the balance sheet date.

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Proceeds from sale of CGT and SCI net of transaction costs

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Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.9)

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-Name Regulation S-X (SX)

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-Section 02

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Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.

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Amount of obligation due after one year or beyond the normal operating cycle, if longer.

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Period end amount of total net PPE.

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Total of noncurrent other assets held by public utility entities.

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