SHARE-BASED COMPENSATION Liability Awards (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Liability Awards
Cash-Settled Liabilities	$ 11.8	$ 12.2	$ 11.8
Compensation Expenses Recognized Resulting From Fair Value Adjustments of Performance Awards	20.3	8.7	15.0
Capitalized Compensation Expense	3.1	1.4	2.7
Restricted Stock Units
Liability Awards
Percentage of Performance Award Granted in Form of Restricted Stock Units (as a percent)	20.00%
Performance Shares [Member]
Liability Awards
Percentage of Performance Award Granted in Form of Performance Shares (as a percent)	80.00%
Weight of Entity's Performance Against Pre-Determined Measures of Total Stockholder Return As Compared to Peer Groups of Utilities to Determine Payout of Performance Shares as a Percentage	50.00%
Weight of Growth in GAAP-adjusted net earnings per share from operations to determine payout of performance shares as a percent	50.00%
SCE&G
Liability Awards
Cash-Settled Liabilities	1.9	3.2	8.7
Compensation Expenses Recognized Resulting From Fair Value Adjustments of Performance Awards	12.6	5.5	9.5
Capitalized Compensation Expense	$ 0.6	$ 0.5	$ 2.1
SCE&G \| Restricted Stock Units
Liability Awards
Performance cycle (in years)	3 years
Percentage of Performance Award Granted in Form of Restricted Stock Units (as a percent)	20.00%
SCE&G \| Performance Shares [Member]
Liability Awards
Percentage of Performance Award Granted in Form of Performance Shares (as a percent)	80.00%
Weight of Entity's Performance Against Pre-Determined Measures of Total Stockholder Return As Compared to Peer Groups of Utilities to Determine Payout of Performance Shares as a Percentage	50.00%
Weight of Growth in GAAP-adjusted net earnings per share from operations to determine payout of performance shares as a percent	50.00%

Represents the percentage of performance award granted in the form of performance shares.

No definition available.

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- Definition

Represents compensation cost capitalized during the period arising from the deferred compensation arrangement.

+ References

No definition available.

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- Definition

Represents the percentage of performance award granted in the form of restricted stock units.

+ References

No definition available.

+ Details

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- Definition

Represents the weight of the entity's performance against pre-determined measures of TSR as compared to a peer group of utilities to determine the payout performance shares.

+ References

No definition available.

+ Details

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- Definition

Represents the weight of growth in GAAP-adjusted net earnings from operations to determine the payout of performance shares.

+ References

No definition available.

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- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

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-Section 30

-Paragraph 1

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- Definition

Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

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-Publisher FASB

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-Topic 718

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- Definition

Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (k)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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