Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Comprehensive income
Net income	$ 1,292	$ 2,220
Currency translation adjustment:
Currency translation adjustment (net of tax provision (benefit) of $(36) and $89)	44	(23)
Unrealized gains and losses on hedging instruments:
Reclassification adjustment for losses included in net income (net of tax benefit of $1 and $0)	3	1
Pension and other postretirement benefit liability adjustments:
Pension and other postretirement benefit liability adjustments arising during the period (net of tax (provision) benefit of $(1) and $(1))	1	3
Amortization of net loss included in net periodic pension cost (net of tax benefit of $0 and $1)	0	2
Total other comprehensive income/(loss)	48	(17)
Comprehensive income	1,340	2,203
Less: comprehensive income/(loss) attributable to noncontrolling interests and redeemable noncontrolling interest	6	2
Comprehensive income attributable to Thermo Fisher Scientific Inc.	$ 1,334	$ 2,201