CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Revenues
Total revenues	$ 10,598	$ 10,574	$ 31,484	$ 31,971
Costs and operating expenses:
Selling, general and administrative expenses	2,098	2,049	6,392	6,313
Research and development expenses	346	319	1,016	1,010
Restructuring and other costs	45	84	151	379
Total costs and operating expenses	8,759	8,710	26,163	26,966
Operating income	1,838	1,864	5,321	5,005
Interest income	277	246	851	570
Interest expense	(356)	(359)	(1,073)	(985)
Other income/(expense)	(16)	14	(2)	(32)
Income before income taxes	1,742	1,765	5,096	4,558
Provision for income taxes	(99)	(53)	(507)	(151)
Equity in earnings/(losses) of unconsolidated entities	(14)	(17)	(75)	(58)
Net income	1,629	1,695	4,514	4,349
Less: net income/(losses) attributable to noncontrolling interests and redeemable noncontrolling interest	0	(20)	9	(16)
Net income attributable to Thermo Fisher Scientific Inc.	$ 1,630	$ 1,715	$ 4,505	$ 4,365
Earnings per share attributable to Thermo Fisher Scientific Inc.
Basic (in dollars per share)	$ 4.26	$ 4.44	$ 11.79	$ 11.31
Diluted (in dollars per share)	$ 4.25	$ 4.42	$ 11.75	$ 11.25
Weighted average shares
Basic (in shares)	382	386	382	386
Diluted (in shares)	384	388	383	388
Product revenues
Revenues
Total revenues	$ 6,148	$ 6,157	$ 18,266	$ 18,832
Costs and operating expenses:
Cost of revenues	3,170	3,214	9,189	9,829
Service revenues
Revenues
Total revenues	4,450	4,417	13,218	13,139
Costs and operating expenses:
Cost of revenues	$ 3,100	$ 3,044	$ 9,415	$ 9,435