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Redeemable Noncontrolling Interest (Tables)
12 Months Ended
Dec. 31, 2012
Redeemable Noncontrolling Interests [Abstract]  
Redeemable Noncontrolling Interest [Table Text Block]
The following table summarizes the changes in our redeemable noncontrolling interest for the period ended December 31 (in millions):
 
2012
Balance on September 1, 2012
$
319

Accretion to the redemption value of noncontrolling interest (recognized in Interest expense)
3

Ending balance
$
322