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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2011
Accounting Policies [Abstract]  
Accounts and notes receivable, net
 
 
2011
 
2010
Accounts and notes receivable
 
$
308

 
$
289

Allowance for doubtful accounts
 
(22
)
 
(33
)
Accounts and notes receivable, net
 
$
286

 
$
256