The aggregate amount of receivables to be collected from related parties 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, at the financial statement date. which are usually due within one year (or one business cycle).

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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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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The increase (decrease) during the reporting period in the obligations due for goods and services provided by the following types of related parties: a parent company and its subsidiaries, subsidiaries of a common parent, an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management, an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.

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AFFILIATED TRANSACTIONS - SCEG AFFILIATED TRANSACTIONS -SCEG (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 45.2		$ 45.8
Canadys Refined Coal LLC [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage	40.00%
Cope Refined Coal LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction Purchases from Related Party	14.3	27.1
Due from Related Parties, Current	14.3	26.9
Increase (Decrease) Due from Affiliates	7.9		1.8
Equity Method Investment, Dividends or Distributions	8.0		1.8
SCEG
Related Party Transaction [Line Items]
Due to Affiliate, Current	128.0		124.0
SCEG \| Canadys Refined Coal LLC [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage			10.00%
CGT [Member]
Related Party Transaction [Line Items]
Related Party Transaction Purchases from Related Party	8.4	10.0
Due to Affiliate, Current	3.2		3.4
Retail Gas Marketing and Energy Marketing
Related Party Transaction [Line Items]
Due to Affiliate, Current	14.1		13.1
Cost of Natural Gas Purchases	$ 42.1	$ 25.4