Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2025

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

12.Supplemental Cash Flow Information

Noncash investing and financing activities are as follows:

	Six Months Ended
	June 30,
	2025			2024
	(Dollars in Millions)
Accrued liabilities for purchases of property, plant and equipment	$	61		$	49
Right-of-use assets obtained in exchange for new    operating lease liabilities	$	42		$	43
Right-of-use assets obtained in exchange for    new finance lease liabilities	$	16		$	9
Remeasurement of finance lease right-of-use assets	$	50		$	25
Remeasurement of operating lease right-of-use assets	$	(1	)	$	3
Accrued benefits on life insurance contracts	$	5		$	—

Supplemental disclosures of cash flow information are as follows:

	Six Months Ended
	June 30,
	2025		2024
	(Dollars in Millions)
Cash paid for interest, net of capitalized amount	$	115	$	76
Cash paid for income taxes, net of refunds	$	32	$	374