Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Comprehensive income
Net income	$ 1,498	$ 1,903	$ 5,386	$ 6,069
Currency translation adjustment:
Currency translation adjustment (net of tax provision (benefit) of $157, $74, $419 and $169)	(216)	(32)	(632)	121
Unrealized gains and losses on hedging instruments:
Reclassification adjustment for losses included in net income (net of tax benefit of $0, $0, $1 and $5)	1	2	2	16
Pension and other postretirement benefit liability adjustments:
Pension and other postretirement benefit liability adjustments arising during the period (net of tax (provision) benefit of $(3), $(1), $(6) and $(3))	4	3	13	7
Amortization of net loss included in net periodic pension cost (net of tax benefit of $0, $2, $2 and $4)	4	3	8	9
Total other comprehensive items	(207)	(24)	(609)	153
Comprehensive income	1,291	1,879	4,777	6,222
Less: comprehensive income/(loss) attributable to noncontrolling interests and redeemable noncontrolling interest	0	1	2	2
Comprehensive income attributable to Thermo Fisher Scientific Inc.	$ 1,291	$ 1,878	$ 4,775	$ 6,220