3M Company Shareholders

Common

Accumulated

Stock and

Other

Additional

Comprehensive

Non-

Paid-in

Retained

Treasury

Income

controlling

(Millions)

Total

Capital

Earnings

Stock

(Loss)

Interest

Balance at March 31, 2018

$

11,039

$

5,505

$

38,453

$

(26,178)

$

(6,803)

$

62

Net income

1,862

1,857

 5

Other comprehensive income (loss), net of tax:

Cumulative translation adjustment

(496)

(492)

(4)

Defined benefit pension and post-retirement plans adjustment

114

114

 —

Cash flow hedging instruments - unrealized gain (loss)

162

162

 —

Total other comprehensive income (loss), net of tax

(220)

Dividends declared

(802)

(802)

Stock-based compensation

54

54

Reacquired stock

(1,591)

(1,591)

Issuances pursuant to stock option and benefit plans

86

(66)

152

Balance at June 30, 2018

$

10,428

$

5,559

$

39,442

$

(27,617)

$

(7,019)

$

63

3M Company Shareholders

Common

Accumulated

Stock and

Other

Additional

Comprehensive

Non-

Paid-in

Retained

Treasury

Income

controlling

(Millions)

Total

Capital

Earnings

Stock

(Loss)

Interest

Balance at December 31, 2017

$

11,622

$

5,361

$

39,115

$

(25,887)

$

(7,026)

$

59

Net income

2,468

2,459

 9

Other comprehensive income (loss), net of tax:

Cumulative translation adjustment

(329)

(324)

(5)

Defined benefit pension and post-retirement plans adjustment

230

230

 —

Cash flow hedging instruments - unrealized gain (loss)

101

101

 —

Total other comprehensive income (loss), net of tax

 2

Dividends declared

(1,612)

(1,612)

Stock-based compensation

198

198

Reacquired stock

(2,563)

(2,563)

Issuances pursuant to stock option and benefit plans

313

(520)

833

Balance at June 30, 2018

$

10,428

$

5,559

$

39,442

$

(27,617)

$

(7,019)

$

63

3M Company Shareholders

Common

Accumulated

Stock and

Other

Additional

Comprehensive

Non-

Paid-in

Retained

Treasury

Income

controlling

(Millions)

Total

Capital

Earnings

Stock

(Loss)

Interest

Balance at March 31, 2017

$

11,040

$

5,198

$

38,094

$

(25,354)

$

(6,949)

$

51

Net income

1,585

1,583

 2

Other comprehensive income (loss), net of tax:

Cumulative translation adjustment

(67)

(67)

 —

Defined benefit pension and post-retirement plans adjustment

78

78

 —

Cash flow hedging instruments - unrealized gain (loss)

(51)

(51)

 —

Total other comprehensive income (loss), net of tax

(40)

Dividends declared

(701)

(701)

Stock-based compensation

55

55

Reacquired stock

(475)

(475)

Issuances pursuant to stock option and benefit plans

180

(183)

363

Balance at June 30, 2017

$

11,644

$

5,253

$

38,793

$

(25,466)

$

(6,989)

$

53

3M Company Shareholders

Common

Accumulated

Stock and

Other

Additional

Comprehensive

Non-

Paid-in

Retained

Treasury

Income

controlling

(Millions)

Total

Capital

Earnings

Stock

(Loss)

Interest

Balance at December 31, 2016

$

10,343

$

5,070

$

37,907

$

(25,434)

$

(7,245)

$

45

Net income

2,911

2,906

 5

Other comprehensive income (loss), net of tax:

Cumulative translation adjustment

225

222

 3

Defined benefit pension and post-retirement plans adjustment

161

161

 —

Cash flow hedging instruments - unrealized gain (loss)

(127)

(127)

 —

Total other comprehensive income (loss), net of tax

259

Dividends declared

(1,403)

(1,403)

Stock-based compensation

183

183

Reacquired stock

(1,153)

(1,153)

Issuances pursuant to stock option and benefit plans

504

(617)

1,121

Balance at June 30, 2017

$

11,644

$

5,253

$

38,793

$

(25,466)

$

(6,989)

$

53

Total

Defined Benefit

Cash Flow

Accumulated

Pension and

Hedging

Other

Cumulative

Postretirement

Instruments,

Comprehensive

Translation

Plans

Unrealized

Income

(Millions)

Adjustment

Adjustment

Gain (Loss)

(Loss)

Balance at March 31, 2018, net of tax:

$

(1,470)

$

(5,160)

$

(173)

$

(6,803)

Other comprehensive income (loss), before tax:

Amounts before reclassifications

(411)

 —

182

(229)

Amounts reclassified out

 —

151

28

179

Total other comprehensive income (loss), before tax

(411)

151

210

(50)

Tax effect

(81)

(37)

(48)

(166)

Total other comprehensive income (loss), net of tax

(492)

114

162

(216)

Balance at June 30, 2018, net of tax:

$

(1,962)

$

(5,046)

$

(11)

$

(7,019)

Total

Defined Benefit

Cash Flow

Accumulated

Pension and

Hedging

Other

Cumulative

Postretirement

Instruments,

Comprehensive

Translation

Plans

Unrealized

Income

(Millions)

Adjustment

Adjustment

Gain (Loss)

(Loss)

Balance at December 31, 2017, net of tax:

$

(1,638)

$

(5,276)

$

(112)

$

(7,026)

Other comprehensive income (loss), before tax:

Amounts before reclassifications

(282)

 —

100

(182)

Amounts reclassified out

 —

302

62

364

Total other comprehensive income (loss), before tax

(282)

302

162

182

Tax effect

(42)

(72)

(61)

(175)

Total other comprehensive income (loss), net of tax

(324)

230

101

 7

Balance at June 30, 2018, net of tax:

$

(1,962)

$

(5,046)

$

(11)

$

(7,019)

Total

Defined Benefit

Cash Flow

Accumulated

Pension and

Hedging

Other

Cumulative

Postretirement

Instruments,

Comprehensive

Translation

Plans

Unrealized

Income

(Millions)

Adjustment

Adjustment

Gain (Loss)

(Loss)

Balance at March 31, 2017, net of tax:

$

(1,719)

$

(5,245)

$

15

$

(6,949)

Other comprehensive income (loss), before tax:

Amounts before reclassifications

(167)

 —

(74)

(241)

Amounts reclassified out

 —

119

(5)

114

Total other comprehensive income (loss), before tax

(167)

119

(79)

(127)

Tax effect

100

(41)

28

87

Total other comprehensive income (loss), net of tax

(67)

78

(51)

(40)

Balance at June 30, 2017, net of tax:

$

(1,786)

$

(5,167)

$

(36)

$

(6,989)

Total

Defined Benefit

Cash Flow

Accumulated

Pension and

Hedging

Other

Cumulative

Postretirement

Instruments,

Comprehensive

Translation

Plans

Unrealized

Income

(Millions)

Adjustment

Adjustment

Gain (Loss)

(Loss)

Balance at December 31, 2016, net of tax:

$

(2,008)

$

(5,328)

$

91

$

(7,245)

Other comprehensive income (loss), before tax:

Amounts before reclassifications

59

 —

(175)

(116)

Amounts reclassified out

 —

238

(23)

215

Total other comprehensive income (loss), before tax

59

238

(198)

99

Tax effect

163

(77)

71

157

Total other comprehensive income (loss), net of tax

222

161

(127)

256

Balance at June 30, 2017, net of tax

$

(1,786)

$

(5,167)

$

(36)

$

(6,989)

Amount Reclassified from

Details about Accumulated Other

Accumulated Other Comprehensive Income

Comprehensive Income Components

Three months ended June 30,

Six months ended June 30,

Location on Income

(Millions)

2018

2017

2018

2017

Statement

Gains (losses) associated with defined benefit pension and postretirement plans amortization

Prior service benefit

$

19

$

22

$

38

$

44

See Note 11

Net actuarial loss

(170)

(141)

(340)

(282)

See Note 11

Total before tax

(151)

(119)

(302)

(238)

Tax effect

37

41

72

77

Provision for income taxes

Net of tax

$

(114)

$

(78)

$

(230)

$

(161)

Cash flow hedging instruments gains (losses)

Foreign currency forward/option contracts

$

(27)

$

 5

$

(61)

$

23

Cost of sales

Interest rate swap contracts

(1)

 —

(1)

 —

Interest expense

Total before tax

(28)

 5

(62)

23

Tax effect

 7

(2)

15

(8)

Provision for income taxes

Net of tax

$

(21)

$

 3

$

(47)

$

15

Total reclassifications for the period, net of tax

$

(135)

$

(75)

$

(277)

$

(146)