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Balance Sheet Components Other Current Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Regulatory liabilities—current $ 53 $ 60
Accrued employee compensation and benefits 43 51
Accrued interest payable 25 26
Accrued dividends payable 27 23
Accrued taxes payable 21 22
Other 59 54
Total accrued expenses and other current liabilities $ 228 $ 236