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Valuation and Qualifying Accounts (Tables)
12 Months Ended
Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]  
Summary of Valuation Allowance [Table Text Block]
Valuation and Qualifying Accounts

 
Year Ending December 31,
 
2013
 
2012
 
2011
 
(In millions)
Allowance for Doubtful Accounts (shown as deduction from Accounts Receivable in the Consolidated Statements of Financial Position)
 
 
 
 
 
Balance at Beginning of Period
$
62

 
$
162

 
$
196

Additions:
 
 
 
 
 
Charged to costs and expenses
94

 
79

 
94

Charged to other accounts (a)
23

 
16

 
18

Deductions (b)
(124
)
 
(195
)
 
(146
)
Balance at End of Period
$
55

 
$
62

 
$
162