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Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pay vs Performance Disclosure
Net Income Attributable to Merck & Co., Inc.	$ 365	$ 14,519	$ 13,049

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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