Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable - Allowance for Doubtful Accounts (Details)

v3.20.2
Accounts Receivable - Allowance for Doubtful Accounts (Details)
$ in Millions
6 Months Ended
Jun. 30, 2020
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Notes receivable $ 15
Accounts Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 47
Provision for doubtful accounts 21
Bad debt write-offs (13)
Ending balance 67
Cumulative Effect, Period Of Adoption, Adjustment | Accounting Standards Update 2016-13  
Accounts Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 12
Financing Receivable with Deferred Income Offset [Member]  
Accounts Receivable, Allowance for Credit Loss [Roll Forward]  
Financing Receivable, after Allowance for Credit Loss $ 18