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Balance Sheet Components Other Current Liabilities (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Accrued employee compensation and benefits | $ 36 | $ 46
Accrued interest payable | 33 | 23
Accrued taxes payable | 30 | 21
Accrued dividends payable | 20 | 21
Regulatory liabilities—current | 11 | 12
Other | 62 | 56
Total accrued expenses and other current liabilities | $ 192 | $ 179

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