Revenue Recognition and Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Summary of Net Sales by Region and Channel

Net sales by region (determined based on country of shipment) and channel are as follows:

	Three Months Ended March 31, 2024								Three Months Ended March 31, 2023
	OEM		Aftermarket		Other		Total		OEM		Aftermarket		Other		Total
	(Dollars in millions)
United States	$	126	$	51	$	1	$	178	$	123	$	49	$	1	$	173
Europe	418		43		8		469		446		43		8		497
Asia	236		12		4		252		267		12		3		282
Other	10		6		—		16		12		6		—		18
	$	790	$	112	$	13	$	915	$	848	$	110	$	12	$	970

Summary of Contract Assets and Liabilities

The following table summarizes our contract assets and liabilities balances:

	2024		2023
	(Dollars in millions)
Contract assets—January 1	$	38	$	46
Contract assets—March 31	48		66
Change in contract assets—Increase/(Decrease)	$	10	$	20
Contract liabilities—January 1	$	(11)	$	(8)
Contract liabilities—March 31	(10)		(10)
Change in contract liabilities—Decrease/(Increase)	$	1	$	(2)