Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenues	$ 1,602	$ 1,582	$ 4,709	$ 4,811
Cost of sales	745	659	2,137	1,992
Gross profit	857	923	2,572	2,819
Selling, general and administrative	415	422	1,288	1,290
Research and development	84	111	275	339
Acquired in-process research and development and milestones	0	51	6	81
Restructuring costs	0	0	88	23
Interest expense	128	126	383	388
Exchange losses	17	6	12	11
Other (income) expense, net	(30)	0	(53)	9
Income before income taxes	243	207	573	678
Income tax expense (benefit)	83	(152)	181	(77)
Net income	$ 160	$ 359	$ 392	$ 755
Earnings per share:
Basic (in dollars per share)	$ 0.61	$ 1.39	$ 1.51	$ 2.94
Diluted (in dollars per share)	$ 0.61	$ 1.38	$ 1.50	$ 2.92
Weighted average shares outstanding:
Basic (in shares)	259,975	257,498	259,266	256,830
Diluted (in shares)	260,653	259,757	260,611	258,908

Other Operating And Nonoperating Income (Expense)

No definition available.

Name:	ogn_OtherOperatingAndNonoperatingIncomeExpense
Namespace Prefix:	ogn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.