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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
Schedule II – Valuation and Qualifying Accounts
 
Allowance for Doubtful Accounts for the Years Ended December 31, 2012, 2011 and 2010
(Millions)
Balance at
Beginning
of Year
 
Charged to
Costs and
Expenses
 
Deductions(1)
 
Balance at
End of
Year
2012
$
71

 
$
24

 
$
(18
)
 
$
77

2011
$
91

 
$
31

 
$
(51
)
 
$
71

2010
$
122

 
$
18

 
$
(49
)
 
$
91

(1)
Notes and accounts receivable written off as uncollectible, net of recoveries, amounts attributable to divestitures and changes attributable to foreign currency translation.
(2)
Expenses and deductions during 2011 were elevated by $9 million due to a U.K. based retail do-it-yourself customer who filed for bankruptcy during the second quarter of 2011.