Annual report pursuant to Section 13 and 15(d)

Accounts Receivable Accounts Receivable (Accounts Receivable) (Details)

v3.20.4
Accounts Receivable Accounts Receivable (Accounts Receivable) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
installment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Accounts receivable, gross $ 1,726 $ 1,936  
Less allowance for credit losses (124) (123)  
Accounts receivable, net 1,602 1,813  
Installment sales plan      
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Accounts receivable, gross 1,368 1,586  
Credit Card Receivable [Member]      
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Accounts receivable, gross 262 247  
Other receivables [Member]      
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Accounts receivable, gross 96 103  
SG&A      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Finance income from company branded credit card issued by financial institution $ 140 $ 124 $ 118
Minimum | Installment sales plan      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Number of installments plan permits for customers | installment 2