Subsequent Events (Notes)

12 Months Ended

Dec. 31, 2012

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Note 17. Subsequent Events

On February 28, 2013 we entered into a new $2.8 billion unsecured revolving credit facility that expires in February 2018 with an interest rate equal to the LIBOR plus a spread that varies depending on the Company’s credit ratings. This new credit facility replaced the $2.2 billion revolving credit facility that was due to expire in October 2013.