Intangibles, net (Tables)

12 Months Ended

Dec. 31, 2023

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Identified Intangible Assets by Major Classification

Identified intangible assets by major classification consist of the following (in millions):

			Accumulated			Net Book
	Gross		Amortization			Value
December 31, 2023:
Trade names and patents	$	2	$	(1	)	$	1
Customer relationships		29		(4	)		25
Other		4		(2	)		2
Total identified intangibles	$	35	$	(7	)	$	28
December 31, 2022:
Trade names and patents	$	4	$	—		$	4
Customer relationships		19		(2	)		17
Other		4		—			4
Total identified intangibles	$	27	$	(2	)	$	25

Schedule of Estimated Amortization of Intangible Assets Excluding Assets Held-for-Sale

Amortization expense was $5 million, $2 million and $2 million for the years ended December 31, 2023, 2022, and 2021, respectively. The following table represents the total estimated amortization of intangible assets for the five succeeding years (in millions):

For the Year Ending December 31,	Estimated Amortization Expense
2024	$	5
2025		4
2026		3
2027		3
2028		3