Stock-Based Compensation Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jun. 03, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Share-based Payment Arrangement, Expense				$ 17
Converted from Merck, stock options, shares	4,100,000
Stock-based compensation		$ 101	$ 75	59
Amount of unrecognized compensation costs		$ 153
Amount of unrecognized compensation costs period for recognition		1 year 10 months 9 days
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Share-based Payment Arrangement, Expense				$ 4
Options | 2021 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights				3 years
Award expiration period				10 years
PSU's
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period		3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of shares awards issued	3,300,000
Converted from Merck, restricted share units average price (in usd per share)	$ 36.77
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Converted from Merck, stock options, average price (in usd per share)	$ 8.55
Employee Stock and Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 1
Performance Shares Based on Total Stockholder Return | 2021 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights		3 years
Performance Shares Based on Free Cash Flow | 2021 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights		3 years