Accounting Policies - Summary of Balance of Allowances for Credit Losses, Doubtful Accounts with Accounts Receivable and Changes (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	$ 131	$ 126
Current period provision	11	14
Write-offs charged against the allowance	(2)	(2)
Translation	3	(7)
Balance	143	131
Americas
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	34	38
Current period provision	8	0
Write-offs charged against the allowance	(1)	(1)
Translation	0	(3)
Balance	41	34
Europe, Middle East & Africa
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	87	78
Current period provision	2	14
Write-offs charged against the allowance	(1)	(1)
Translation	3	(4)
Balance	91	87
Asia Pacific
Financing Receivable Allowance For Credit Losses [Line Items]
Balance	10	10
Current period provision	1	0
Write-offs charged against the allowance	0	0
Translation	0	0
Balance	$ 11	$ 10