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Equity (Tables)

3 Months Ended

Mar. 31, 2025

Equity [Abstract]

Schedule of Equity


			Three Months Ended March 31,
			Common Stock						Other Paid-In Capital			Retained Earnings			Accumulated Other Comprehensive Loss			Treasury Stock						Non- controlling Interests			Total
($ and shares in millions except per share amounts)			Shares			Par Value												Shares			Cost
Balance at January 1, 2024			3,577			$	1,788		$	44,509		$	53,895		$	(5,161)		1,045			$	(57,450)		$	54		$	37,635
Net income attributable to Merck & Co., Inc.			—			—			—			4,762			—			—			—			—			4,762
Other comprehensive loss, net of taxes			—			—			—			—			(113)			—			—			—			(113)
Cash dividends declared on common stock ($0.77 per share)			—			—			—			(1,960)			—			—			—			—			(1,960)
Treasury stock shares purchased			—			—			—			—			—			1			(122)			—			(122)
Share-based compensation plans and other			—			—			89			—			—			(2)			127			1			217
Net income attributable to noncontrolling interests			—			—			—			—			—			—			—			5			5

Balance at March 31, 2024			3,577			$	1,788		$	44,598		$	56,697		$	(5,274)		1,044			$	(57,445)		$	60		$	40,424
Balance at January 1, 2025			3,577			$	1,788		$	44,704		$	63,069		$	(4,945)		1,049			$	(58,303)		$	59		$	46,372
Net income attributable to Merck & Co., Inc.			—			—			—			5,079			—			—			—			—			5,079
Other comprehensive loss, net of taxes			—			—			—			—			(20)			—			—			—			(20)
Cash dividends declared on common stock ($0.81 per share)			—			—			—			(2,051)			—			—			—			—			(2,051)
Treasury stock shares purchased			—			—			—			—			—			13			(1,164)			—			(1,164)
Share-based compensation plans and other			—			—			112			—			—			(1)			66			—			178
Net income attributable to noncontrolling interests			—			—			—			—			—			—			—			6			6

Balance at March 31, 2025			3,577			$	1,788		$	44,816		$	66,097		$	(4,965)		1,061			$	(59,401)		$	65		$	48,400