Summary of Significant Accounting Policies - Changes in Allowances for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for Trade Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at January 1	$ (42)	$ (35)
Current period provision for expected credit losses	(3)	(10)
Write-offs charged against the allowance	5	2
Currency	3	1
Balance at December 31	(37)	(42)
Allowance for Other Current Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at January 1	(42)	(44)
Current period provision for expected credit losses	(13)	(1)
Write-offs charged against the allowance	3	2
Currency	3	1
Balance at December 31	(49)	(42)
Allowance for Long-Term Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at January 1	(12)	(14)
Current period provision for expected credit losses	0	(1)
Write-offs charged against the allowance	2	0
Currency	0	3
Balance at December 31	$ (10)	$ (12)