Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Fair value of assets and liabilities measured on a recurring basis

The following table presents the financial assets and liabilities the company records at fair value on a recurring basis identified by the level of inputs used to determine fair value. See Note 1 for the definitions of these levels and for further information on our financial instruments.

	December 31, 2023								December 31, 2022
$ in millions	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Financial Assets
Marketable securities	$	321	$	1	$	8	$	330	$	310	$	1	$	8	$	319
Marketable securities valued using NAV							9								13
Total marketable securities	321		1		8		339		310		1		8		332
Derivatives	—		5		—		5		—		7		—		7