Accounting Policies - Summary of Balance of Allowances for Credit Losses, Doubtful Accounts with Accounts Receivable and Changes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	$ 143	$ 126
Current period provision	7	25
Write-offs charged against the allowance	(4)	(4)
Translation	3	(4)
Balance	149	143
Americas
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	41	38
Current period provision	1	8
Write-offs charged against the allowance	(1)	(2)
Translation	0	(3)
Balance	41	41
Europe, Middle East & Africa
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	91	78
Current period provision	5	16
Write-offs charged against the allowance	(3)	(2)
Translation	3	(1)
Balance	96	91
Asia Pacific
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	11	10
Current period provision	1	1
Write-offs charged against the allowance	0	0
Translation	0	0
Balance	$ 12	$ 11