Supplemental Equity and Comprehensive Income (Loss) Information (Tables)

12 Months Ended

Dec. 31, 2023

Stockholders' Equity Note [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M

(Millions)	Cumulative Translation Adjustment		Defined Benefit Pension and Postretirement Plans Adjustment		Cash Flow Hedging Instruments, Unrealized Gain (Loss)		Total Accumulated Other Comprehensive Income (Loss)
Balance at December 31, 2020, net of tax:	$	(1,450)	$	(6,098)	$	(173)	$	(7,721)
Other comprehensive income (loss), before tax:
Amounts before reclassifications	(428)		1,223		108		903
Amounts reclassified out	—		658		47		705
Total other comprehensive income (loss), before tax	(428)		1,881		155		1,608
Tax effect (1)	(65)		(536)		(36)		(637)
Total other comprehensive income (loss), net of tax	(493)		1,345		119		971
Balance at December 31, 2021, net of tax:	(1,943)		(4,753)		(54)		(6,750)
Other comprehensive income (loss), before tax:
Amounts before reclassifications	(850)		866		159		175
Amounts reclassified out	—		458		(98)		360
Total other comprehensive income (loss), before tax	(850)		1,324		61		535
Tax effect (1)	(35)		(409)		(14)		(458)
Total other comprehensive income (loss), net of tax	(885)		915		47		77
Balance at December 31, 2022, net of tax:	$	(2,828)	$	(3,838)	$	(7)	$	(6,673)
Other comprehensive income (loss), before tax:
Amounts before reclassifications	277		(763)		81		(405)
Amounts reclassified out	54		252		(143)		163
Total other comprehensive income (loss), before tax	331		(511)		(62)		(242)
Tax effect (1)	(9)		131		15		137
Total other comprehensive income (loss), net of tax	322		(380)		(47)		(105)
Balance at December 31, 2023, net of tax:	$	(2,506)	$	(4,218)	$	(54)	$	(6,778)

(1) Includes tax expense (benefit) reclassified out of AOCI related to the following:

(millions)	2023	2022		2021
Defined benefit pension and postretirement plans adjustment	(60)	$	(108)	$	(160)
Cash flow hedging instruments, unrealized gain/loss	33	23		(11)