Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component

Changes in Accumulated other comprehensive income (loss) by component are as follows:

($ in millions)	Employee Benefit Plans		Cumulative Translation Adjustment		Accumulated Other Comprehensive Loss
Balance at January 1, 2021, net of taxes	$	(32)	$	(590)	$	(622)
Other comprehensive income, pretax	21		90		111
Tax	(13)		—		(13)
Other comprehensive income, net of taxes	8		90		98
Net Transfer of benefit plans to Merck affiliates	11		—		11
Balance at December 31, 2021, net of taxes	$	(13)	$	(500)	$	(513)
Other comprehensive income (loss), pretax	28		(74)		(46)
Tax	(5)		—		(5)
Other comprehensive income (loss), net of taxes	23		(74)		(51)
Balance at December 31, 2022, net of taxes	$	10	$	(574)	$	(564)
Other comprehensive (loss) income, pretax	(29)		48		19
Tax	4		—		4
Other comprehensive (loss) income, net of taxes	(25)		48		23
Balance at December 31, 2023, net of taxes	$	(15)	$	(526)	$	(541)