Basis of Presentation - Changes in Allowances for Credit Losses (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Allowance for Trade Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ (37)
Net (provision)/recovery for expected credit losses	(1)
Write-offs charged against the allowance	2
Currency and other	(3)
Ending balance	(39)
Allowance for Other Current Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(37)
Net (provision)/recovery for expected credit losses	4
Write-offs charged against the allowance	1
Currency and other	(5)
Ending balance	(37)
Allowance for Long-Term Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(16)
Net (provision)/recovery for expected credit losses	0
Write-offs charged against the allowance	0
Currency and other	(3)
Ending balance	$ (19)