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Long-term Financing and Sales of Receivables (Tables)
 12 Months Ended
Dec. 31, 2022
Receivables [Abstract]  
Long-Term Financing
Long-term receivables consist of 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 3120222021
Long-term receivables, gross$40 $49 
Less allowance for losses(2)(2)
Long-term receivables$38 $47 
Less current portion(13)(20)
Non-current long-term receivables$25 $27 
Proceeds Received from Non-Recourse Sales of Accounts Receivable And Long-Term Receivables
The following table summarizes the proceeds received from sales of accounts receivable and long-term receivables for the years ended December 31, 2022, 2021 and 2020. 
Years ended December 31202220212020
Contract-specific discounting facility$49 $211 $228 
Accounts receivable sales proceeds179 56 74 
Long-term receivables sales proceeds204 248 181 
Total proceeds from receivable sales$432 $515 $483 
Financing Receivables Aging Analysis
An aging analysis of financing receivables at December 31, 2022 and December 31, 2021 is as follows: 
December 31, 2022Total
Long-term
Receivable		Current Billed
Due		Past Due Under 90 DaysPast Due Over 90 Days
Municipal leases secured tax exempt$22 $1 $1 $1 
Commercial loans and leases secured18 — — 2 
Long-term receivables, including current portion$40 $1 $1 $3 
December 31, 2021Total
Long-term
Receivable		Current Billed
Due		Past Due Under 90 DaysPast Due Over 90 Days
Municipal leases secured tax exempt$28 $— $— $— 
Commercial loans and leases secured21 1 — 2 
Long-term receivables, including current portion$49 $1 $— $2