Supplemental Cash Flow Information

3 Months Ended

Mar. 31, 2025

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

12.Supplemental Cash Flow Information

Noncash investing and financing activities are as follows:

	Three Months Ended
	March 31,
	2025			2024
	(Dollars in Millions)
Accrued liabilities for purchases of property, plant and equipment	$	47		$	35
Right-of-use assets obtained in exchange for new    operating lease liabilities	$	26		$	17
Right-of-use assets obtained in exchange for    new finance lease liabilities	$	4		$	5
Remeasurement of operating lease right-of-use assets	$	(1	)	$	—
Remeasurement of finance lease right-of-use assets	$	50		$	—

Supplemental disclosures of cash flow information are as follows:

	Three Months Ended
	March 31,
	2025		2024
	(Dollars in Millions)
Cash paid for interest, net of capitalized amount	$	31	$	39
Cash paid for income taxes, net of refunds	$	1	$	3