Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Comprehensive income
Net income	$ 1,668	$ 1,829	$ 3,888	$ 4,166
Currency translation adjustment:
Currency translation adjustment (net of tax provision (benefit) of $173, $(23), $262 and $95)	(386)	(71)	(416)	153
Unrealized gains and losses on hedging instruments:
Reclassification adjustment for losses included in net income (net of tax benefit of $1, $1, $1 and $5)	0	1	1	14
Pension and other postretirement benefit liability adjustments:
Pension and other postretirement benefit liability adjustments arising during the period (net of tax (provision) benefit of $(2), $0, $(3) and $(2))	6	(2)	9	4
Amortization of net loss included in net periodic pension cost (net of tax benefit of $1, $1, $2 and $2)	2	4	4	6
Total other comprehensive items	(378)	(68)	(402)	177
Comprehensive income	1,290	1,761	3,486	4,343
Less: comprehensive income/(loss) attributable to noncontrolling interests and redeemable noncontrolling interest	7	1	2	1
Comprehensive income attributable to Thermo Fisher Scientific Inc.	$ 1,283	$ 1,760	$ 3,484	$ 4,342