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Supplemental Financial Information
6 Months Ended
Jun. 30, 2021
Supplemental Financial Information [Abstract]  
SUPPLEMENTAL FINANCIAL INFORMATION
16. SUPPLEMENTAL FINANCIAL INFORMATION
The components of accounts receivable are summarized as follows:
In millionsJune 30, 2021December 31, 2020
Accounts receivable
Trade$1,286 $1,120 
Other25 48 
Accounts receivable, gross1,311 1,168 
Less: allowance for credit losses(40)(51)
Total accounts receivable, net$1,271 $1,117 
Our allowance for credit losses as of June 30, 2021 and December 31, 2020 was $40 million and $51 million, respectively. Our allowance for credit losses charged to expense for the three and six months ended June 30, 2021 was $3 million. Our allowance for credit losses charged to expense for the three and six months ended June 30 2020 was $9 million and $19 million, respectively. We increased our allowance for credit losses for the three and six months ended June 30, 2020 by $3 million and $6 million based upon forecasts that reflect increased economic uncertainty resulting from the COVID-19 pandemic. The Company recorded write-offs against the reserve for the three months ended June 30, 2021 and 2020 of $2 million and $4 million, respectively. The Company recorded write-offs against the reserve for the six months ended June 30, 2021 and 2020 of $14 million and $6 million, respectively.
The components of inventory are summarized as follows:
In millionsJune 30, 2021December 31, 2020
Inventories
Work in process and raw materials$148 $133 
Finished goods184 135 
Service parts363 333 
Total inventories$695 $601