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Balance Sheet Components Other Current Liabilities (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Accrued employee compensation and benefits $ 50 $ 46
Accrued interest payable 37 23
Accrued taxes payable 37 21
Accrued dividends payable 23 22
Regulatory liabilities—current 4 1
Other 60 58
Total accrued expenses and other current liabilities $ 211 $ 171