Earnings per Share (Tables)

3 Months Ended

Apr. 01, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Share

	Three months ended
	April 1,		April 2,
(In millions except per share amounts)	2023		2022
Net income attributable to Thermo Fisher Scientific Inc.	$	1,289	$	2,215
Basic weighted average shares	386		392
Plus effect of: stock options and restricted stock units	2		3
Diluted weighted average shares	388		395
Basic earnings per share	$	3.34	$	5.66
Diluted earnings per share	$	3.32	$	5.61
Antidilutive stock options excluded from diluted weighted average shares	2		2