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Commitments (Details) (Commercial and residential water customers, GSWC)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commercial and residential water customers | GSWC
Commercial and residential water customers
Percentage of total revenues	90.00%	90.00%	90.00%

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- Details

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- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

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