Subsequent Events Subsequent Events (Notes)

12 Months Ended

Dec. 31, 2012

Subsequent Event [Line Items]

Subsequent Events [Text Block]

3. Subsequent Event

Shelf Authorization

In January 2013, the Board of Managers (the Board) of the Company authorized an additional $1 billion of debt securities that may be issued pursuant to the debt shelf registration statement filed with the Securities and Exchange Commission (SEC), for a total of $1.75 billion that remains authorized by the Board to be issued through the SEC debt shelf registration process.