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Accounts and Notes Receivable, Net
12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
Accounts and Notes Receivable, Net ACCOUNTS AND NOTES RECEIVABLE, NET
Trade accounts receivable are stated at the amount we expect to collect. We maintain allowances for doubtful accounts for estimated losses by applying historical loss percentages, combined with reasonable and supportable forecasts of future losses, to respective aging categories. Management considers the following factors in developing its current estimate of expected credit losses: customer credit-worthiness, past transaction history with the customer, current economic industry trends, changes in market or regulatory matters, and changes in customer payment terms, including the impacts from COVID-19.
Year Ended December 31,
 20202019
Accounts receivable—trade, net (1)
$738.3 $718.4 
Notes receivable30.3 24.7 
Other101.2 87.0 
Total$869.8 $830.1 
(1)Allowance for doubtful accounts was $26.5 million and $16.0 million at December 31, 2020 and 2019, respectively.
Bad debt expense of $11.7 million, $5.5 million and $2.3 million was included within selling, general and administrative expenses for the years ended December 31, 2020, 2019 and 2018, respectively.