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Long-term Customer Financing and Sales Of Receivables (Tables)
12 Months Ended
Dec. 31, 2012
Long-Term Customer Financing And Sales Of Receivables [Abstract]  
Long-Term Customer Financing
Long-term receivables consist of trade receivables with payment terms greater than twelve months, long-term loans and lease receivables under sales-type leases. Long-term receivables consist of the following: 
December 31
2012
 
2011
Long-term receivables
$
101

 
$
177

Less allowance for losses

 
(10
)
 
101

 
167

Less current portion
(41
)
 
(130
)
Non-current long-term receivables, net
$
60

 
$
37

Proceeds Received From Non-Recourse Sales Of Accounts Receivable And Long-Term Receivables
The following table summarizes the proceeds received from non-recourse sales of accounts receivable and long-term receivables for the years ended December 31, 2012, 2011, and 2010
Years ended December 31
2012
 
2011
 
2010
Cumulative annual proceeds received from one-time sales:
 
 
 
 
 
Accounts receivable sales proceeds
$
12

 
$
8

 
$
30

Long-term receivables sales proceeds
178

 
224

 
67

Total proceeds from one-time sales
190

 
232

 
97

Cumulative annual proceeds received from sales under committed facilities

 

 
70

Total proceeds from receivables sales
$
190

 
$
232

 
$
167

Financing Receivables Aging Analysis
An aging analysis of financing receivables at December 31, 2012 and December 31, 2011 is as follows: 
December 31, 2012
Total
Long-term
Receivable
 
Current Billed
Due
 
Past Due
Under 90 Days
 
Past Due
Over 90 Days
Municipal leases secured tax exempt
$
23

 
$

 
$

 
$

Commercial loans and leases secured
$
78

 
$
1

 
$
2

 
$
4

Total gross long-term receivables, including current portion
$
101

 
$
1

 
$
2

 
$
4


December 31, 2011
Total
Long-term
Receivable
 
Current Billed
Due
 
Past Due
Under 90 Days
 
Past Due
Over 90 Days
Municipal leases secured tax exempt
$
14

 
$

 
$

 
$

Commercial loans and leases secured
$
61

 
$
1

 
$
2

 
$

Commercial loans unsecured
$
102

 
$

 
$

 
$

Total gross long-term receivables, including current portion
$
177

 
$
1

 
$
2

 
$