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Revenue Recognition - Allowance for Doubtful Accounts by Operating Segment (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2021
USD ($)
Accounts receivable allowance  
Balance at beginning of period $ 132
Charged to Earnings 5
Write-offs (19)
Foreign Currency (4)
Other (11)
Balance at end of period 103
Financing receivable allowance  
Balance at beginning of period 48
Charged to Earnings 0
Write-offs 0
Foreign Currency 1
Other (21)
Balance at end of period 28
Balance at beginning of period 180
Charged to Earnings 5
Write-offs (19)
Foreign Currency (3)
Other (32)
Balance at end of period 131
North America  
Accounts receivable allowance  
Balance at beginning of period 7
Charged to Earnings 3
Write-offs (3)
Foreign Currency 0
Other 0
Balance at end of period 7
EMEA  
Accounts receivable allowance  
Balance at beginning of period 67
Charged to Earnings 1
Write-offs (14)
Foreign Currency (3)
Other 0
Balance at end of period 51
Latin America  
Accounts receivable allowance  
Balance at beginning of period 44
Charged to Earnings 1
Write-offs (2)
Foreign Currency 0
Other 0
Balance at end of period 43
Financing receivable allowance  
Balance at beginning of period 27
Charged to Earnings 0
Write-offs 0
Foreign Currency 1
Other 0
Balance at end of period 28
Asia  
Accounts receivable allowance  
Balance at beginning of period 14
Charged to Earnings 0
Write-offs
Foreign Currency (1)
Other (11)
Balance at end of period 2
Financing receivable allowance  
Balance at beginning of period 21
Charged to Earnings 0
Write-offs 0
Foreign Currency 0
Other (21)
Balance at end of period $ 0