COMMITMENTS AND CONTINGENCIES - OTHER LITIGATION (Details) £ in Millions, $ in Millions |
3 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2016
USD ($)
|
Oct. 01, 2015
GBP (£)
|
Oct. 01, 2014
GBP (£)
|
|
| Wind Farm [Member] | San Diego Gas and Electric Company [Member] | |||
| Loss Contingencies [Line Items] | |||
| Estimated Tax Equity Investment | $ 285 | ||
| So Cal Gas PCB Litigation [Member] | Southern California Gas Company [Member] | |||
| Loss Contingencies [Line Items] | |||
| Loss Contingency, Number Of Lawsuits | 7 | ||
| Number of Lawsuits Settled | 6 | ||
| Mobile Gas Litigation [Member] | |||
| Loss Contingencies [Line Items] | |||
| Loss Contingency, Number Of Lawsuits | 14 | ||
| Number of Lawsuits Settled | 11 | ||
| Loss Contingency Number Of Plaintiffs | 250 | ||
| HMRC VAT Claim [Member] | |||
| Loss Contingencies [Line Items] | |||
| VAT Tax Claim Paid Upon Appeal | £ | £ 156 | £ 86 | |
| Investment in RBS Sempra Commodities LLP | $ 67 |