CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) - USD ($) $ in Millions		Total	Common Stock		Treasury Stock		Treasury Stock Share Repurchase Program	[3]	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Equity Attributable to Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2023	[1]		501,900,000
Beginning balance at Dec. 31, 2023		$ 4,991	$ 5		$ (5,597)				$ 1,133	$ 10,295	$ (839)	$ (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,915								1,905		10
Other comprehensive (loss)/income, net of tax		(12)									(12)
Deconsolidation of noncontrolling interests		(4)										(4)
Treasury stock, beginning balance (in shares) at Dec. 31, 2023	[1]				43,500,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock acquired, shares	[1]				7,300,000	[2]	500,000
Share-based compensation awards	[3]	45			$ 15				30	0
Treasury stock acquired	[2]	(1,307)			(1,307)
Dividends, Common Stock		(394)								(394)
Ending balance (in shares) at Sep. 30, 2024	[1]		501,900,000
Ending balance at Sep. 30, 2024		5,234	$ 5		$ (6,889)				1,163	11,806	(851)	0
Treasury stock, ending balance (in shares) at Sep. 30, 2024	[1]				50,300,000
Beginning balance (in shares) at Jun. 30, 2024	[1]		501,900,000
Beginning balance at Jun. 30, 2024		4,960	$ 5		$ (6,464)				1,146	11,124	(845)	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		692								682		10
Other comprehensive (loss)/income, net of tax		(6)									(6)
Deconsolidation of noncontrolling interests		(4)										(4)
Treasury stock, beginning balance (in shares) at Jun. 30, 2024	[1]				48,000,000.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock acquired, shares	[1],[2]				2,300,000
Share-based compensation awards	[3]	19			$ 2				17
Treasury stock acquired	[2]	(427)			(427)
Ending balance (in shares) at Sep. 30, 2024	[1]		501,900,000
Ending balance at Sep. 30, 2024		$ 5,234	$ 5		$ (6,889)				1,163	11,806	(851)	0
Treasury stock, ending balance (in shares) at Sep. 30, 2024	[1]				50,300,000
Beginning balance (in shares) at Dec. 31, 2024		501,891,243	501,900,000	[1]
Beginning balance at Dec. 31, 2024		$ 4,770	$ 5		$ (7,445)				1,182	11,968	(940)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		2,070								2,070
Other comprehensive (loss)/income, net of tax		$ 122									122
Treasury stock, beginning balance (in shares) at Dec. 31, 2024		53,418,170			53,400,000	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock acquired, shares	[1]				7,300,000	[2]	300,000
Share-based compensation awards	[3]	$ 50			$ 8				42	0
Treasury stock acquired	[2]	(1,169)			(1,169)
Dividends, Common Stock		$ (445)								(445)
Ending balance (in shares) at Sep. 30, 2025		501,891,243	501,900,000	[1]
Ending balance at Sep. 30, 2025		$ 5,398	$ 5		$ (8,606)				1,224	13,593	(818)	0
Treasury stock, ending balance (in shares) at Sep. 30, 2025		60,426,904			60,400,000	[1]
Beginning balance (in shares) at Jun. 30, 2025	[1]		501,900,000
Beginning balance at Jun. 30, 2025		$ 4,977	$ 5		$ (8,226)				1,203	12,872	(877)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		721								721
Other comprehensive (loss)/income, net of tax		59									59
Treasury stock, beginning balance (in shares) at Jun. 30, 2025	[1]				57,900,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock acquired, shares	[1],[2]				2,500,000
Share-based compensation awards	[3]	22			$ 1				21
Treasury stock acquired	[2]	$ (381)			(381)
Ending balance (in shares) at Sep. 30, 2025		501,891,243	501,900,000	[1]
Ending balance at Sep. 30, 2025		$ 5,398	$ 5		$ (8,606)				$ 1,224	$ 13,593	$ (818)	$ 0
Treasury stock, ending balance (in shares) at Sep. 30, 2025		60,426,904			60,400,000	[1]

[1] Shares may not add due to rounding.

[2] Reflects the acquisition of treasury shares in connection with the share repurchase program and includes excise tax accrued on net share repurchases. For additional information, see Note 13. Stockholders’ Equity.

[3] Includes the issuance of shares of Zoetis Inc. common stock and the reacquisition of shares of treasury stock associated with exercises of employee share-based awards. Also includes the reacquisition of shares of treasury stock associated with the vesting of employee share-based awards to satisfy tax withholding requirements. For additional information, see Note 12. Share-based Payments and Note 13. Stockholders’ Equity.