Receivables (Tables)

12 Months Ended

Dec. 31, 2021

Receivables [Abstract]

Schedule of Receivables

(Dollars in millions)	December 31,
	2021			2020			2019
Receivables	$	1,707		$	1,831		$	1,632
Allowance for credit loss at beginning of year	$	(12	)	$	(9	)	$	(7	)
Reversal of (addition to) allowance		(0	)		(4	)		(4	)
Write-off against allowance		4			1			2
Translation difference		1			(1	)		0
Allowance for credit loss at end of year	$	(8	)	$	(12	)	$	(9	)
Total receivables, net of allowance	$	1,699		$	1,820		$	1,624