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PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS (Tables)
12 Months Ended
Dec. 31, 2021
Employee Benefits [Abstract]  
Disclosure of Employees Total Annual Compensation
As of December 31, 2021, 2020 and 2019, ArcelorMittal had approximately 158,000, 168,000 and 191,000 employees, respectively, and the total annual compensation of ArcelorMittal’s employees in 2021, 2020 and 2019 was as follows:
 Year ended December 31,
Employee Information202120202019
Wages and salaries6,707 7,681 8,380 
Defined benefits cost (see note 8.2)117 260 201 
Other staff expenses1,166 1,405 1,668 
Total7,990 9,346 10,249 
Disclosure of Information About Key Management Personnel
The total annual compensation of ArcelorMittal’s key management personnel, including its Board of Directors, expensed in 2021, 2020 and 2019 was as follows:
 Year ended December 31,
 202120202019
Base salary and directors fees10 
Short-term performance-related bonus12 
Post-employment benefits
Share-based payments— 
Disclosure of Net Defined Benefit Liability (Asset)
Total deferred employee benefits including pension or other post-employment benefits, are as follows:
 December 31,
 20212020
Pension plan benefits2,334 3,000 
Other post-employment benefits and other long-term employee benefits ("OPEB")1,184 1,432 
Termination benefits191 173 
Defined benefit liabilities3,709 4,605 
Provisions for social plans (non-current)63 51 
Total3,772 4,656 
The following tables detail the reconciliation of defined benefit obligation (“DBO”), plan assets, irrecoverable surplus and statements of financial position.
Year ended December 31, 2021
TotalUnited StatesCanadaBrazilEuropeOther
Change in benefit obligation
Benefit obligation at beginning of the period7,604 39 3,590 517 3,173 285 
Current service cost105 29 — 69 
Interest cost on DBO162 89 33 17 22 
Past service cost - Plan amendments31 — 28 — — 
Plan participants’ contribution— — — — 
Settlements(5)— (4)(1)— — 
Actuarial (gain) loss(509)(4)(216)(83)(173)(33)
Demographic assumptions— — 10 (1)— 
Financial assumptions(364)(3)(207)(103)(13)(38)
Experience adjustment(154)(1)(9)10 (159)
Benefits paid(428)(3)(219)(31)(148)(27)
Foreign currency exchange rate differences and other movements(222)— (37)(191)(3)
Benefit obligation at end of the period6,739 34 3,306 398 2,751 250 
Change in plan assets
Fair value of plan assets at beginning of the period4,654 45 3,167 435 1,007 — 
Interest income on plan assets108 76 26 — 
Return on plan assets greater (less) than discount rate41 (4)103 (25)(33)— 
Employer contribution72 — 29 — 43 — 
Plan participants’ contribution— — — — 
Settlements(5)— (4)(1)— — 
Benefits paid(313)(3)(218)(31)(61)— 
Foreign currency exchange rate differences and other movements(62)— 10 (28)(44)— 
Fair value of plan assets at end of the period4,496 39 3,163 376 918 — 
Present value of the wholly or partly funded obligation(5,222)(32)(3,291)(398)(1,501)— 
Fair value of plan assets4,496 39 3,163 376 918 — 
Net present value of the wholly or partly funded obligation(726)(128)(22)(583)— 
Present value of the unfunded obligation(1,517)(2)(15)— (1,250)(250)
Prepaid due to unrecoverable surpluses(33)— (28)(2)(3)— 
Net amount recognized(2,276)(171)(24)(1,836)(250)
Net assets related to funded obligations58 47 — — 
Recognized liabilities(2,334)(2)(218)(24)(1,840)(250)
Change in unrecoverable surplus
Unrecoverable surplus at beginning of the period(27)— (23)(1)(3)— 
Interest cost on unrecoverable surplus(1)— (1)— — — 
Change in unrecoverable surplus in excess of interest(5)— (4)(1)— — 
Unrecoverable surplus at end of the period(33)— (28)(2)(3)— 
Year ended December 31, 2020
TotalUnited StatesCanadaBrazilEuropeOther
Change in benefit obligation
Benefit obligation at beginning of the period10,629 3,505 3,360 664 2,830 270 
Current service cost129 28 25 — 64 12 
Interest cost on DBO279 95 96 36 29 23 
Past service cost - Plan amendments— — 
Past service cost - Curtailments— — — — 
Plan participants’ contribution— — — — 
Actuarial (gain) loss705 237 250 (3)185 36 
Demographic assumptions(32)(32)— — — — 
Financial assumptions795 286 276 214 14 
Experience adjustment(58)(17)(26)(8)(29)22 
Benefits paid(693)(279)(206)(32)(149)(27)
Divestments (note 2.3.1)(3,550)(3,550)— — — — 
Foreign currency exchange rate differences and other movements94 — 62 (148)209 (29)
Benefit obligation at end of the period7,604 39 3,590 517 3,173 285 
Change in plan assets
Fair value of plan assets at beginning of the period7,395 2,881 3,021 576 917 — 
Interest income on plan assets192 69 84 31 — 
Return on plan assets greater (less) than discount rate444 209 188 (12)59 — 
Employer contribution64 21 40 — 
Plan participants’ contribution— — — — 
Plan amendments— — — — 
Benefits paid(579)(276)(205)(32)(66)— 
Divestments (note 2.3.1)(2,842)(2,842)— — — — 
Foreign currency exchange rate differences and other movements(23)— 58 (129)48 — 
Fair value of plan assets at end of the period4,654 45 3,167 435 1,007 — 
Present value of the wholly or partly funded obligation(5,831)(37)(3,575)(517)(1,702)— 
Fair value of plan assets4,654 45 3,167 435 1,007 — 
Net present value of the wholly or partly funded obligation(1,177)(408)(82)(695)— 
Present value of the unfunded obligation(1,773)(2)(15)— (1,471)(285)
Prepaid due to unrecoverable surpluses(27)— (23)(1)(3)— 
Net amount recognized(2,977)(446)(83)(2,169)(285)
Net assets related to funded obligations23 11 — — 
Recognized liabilities(3,000)(2)(457)(83)(2,173)(285)
Change in unrecoverable surplus
Unrecoverable surplus at beginning of the period(30)— (25)(2)(3)— 
Interest cost on unrecoverable surplus(1)— (1)— — — 
Change in unrecoverable surplus in excess of interest— — — 
Unrecoverable surplus at end of the period(27)— (23)(1)(3)— 
Summary of changes in the other post-employment benefit obligation and changes in plan assets are as follows:
Year ended December 31, 2021
TotalUnited StatesCanadaEuropeOthers
Change in benefit obligation
Benefit obligation at beginning of the period1,438 28 742 590 78 
Current service cost— (1)
Interest cost on DBO25 18 
Past service cost - Plan amendments(57)— (58)— 
Past service cost - Curtailments(7)— — (7)— 
Actuarial (gain) loss(111)(1)(66)(43)(1)
Demographic assumptions(1)— (2)— 
Financial assumptions(66)— (55)(5)(6)
Experience adjustment(44)(1)(9)(39)
Benefits paid(82)(1)(34)(44)(3)
Foreign currency exchange rate differences and other movements(25)— 

(24)(2)
Benefit obligation at end of the period1,190 27 661 423 79 
Change in plan assets
Fair value of plan assets at beginning of the period— — — 
Return on plan assets greater than discount rate— — — 
Benefits paid(1)— — (1)— 
Fair value of plan assets at end of the period— — — 
Present value of the wholly or partly funded obligation(29)— — (29)— 
Fair value of plan assets— — — 
Net present value of the wholly or partly funded obligation(23)— — (23)— 
Present value of the unfunded obligation(1,161)(27)(661)(394)(79)
Net amount recognized(1,184)(27)(661)(417)(79)
Year ended December 31, 2020
TotalUnited StatesCanadaEuropeOthers
Change in benefit obligation
Benefit obligation at beginning of the period4,294 2,976 688 546 84 
Current service cost85 44 10 27 
Interest cost on DBO122 91 19 
Past service cost - Plan amendments(1)— (1)— — 
Past service cost - Curtailments— — — 
Plan participants’ contribution23 23 — — — 
Actuarial (gain) loss113 46 41 26 — 
Demographic assumptions(39)(39)— — — 
Financial assumptions266 170 54 37 
Experience adjustment(114)(85)(13)(11)(5)
Benefits paid(208)(131)(30)(37)(10)
Divestments (note 2.3.1)(3,024)(3,024)— — — 
Foreign currency exchange rate differences and other movements31 — 

15 21 (5)
Benefit obligation at end of the period1,438 28 742 590 78 
Change in plan assets
Fair value of plan assets at beginning of the period502 496 — — 
Interest income on plan assets12 12 — — — 
Return on plan assets greater/(less) than discount rate11 11 — — — 
Employer contribution(32)(32)— — — 
Plan participants’ contribution23 23 — — — 
Benefits paid(22)(21)— (1)— 
Divestments (note 2.3.1)(489)(489)— — — 
Foreign currency exchange rate differences and other movements— — — 
Fair value of plan assets at end of the period— — — 
Present value of the wholly or partly funded obligation(34)— — (34)— 
Fair value of plan assets— — — 
Net present value of the wholly or partly funded obligation(28)— — (28)— 
Present value of the unfunded obligation(1,404)(28)(742)(556)(78)
Net amount recognized(1,432)(28)(742)(584)(78)
Components of Net Periodic Pension and Post-employment Cost
The following tables detail the components of net periodic pension cost:
 Year ended December 31, 2021
Net periodic pension cost (income)TotalUnited StatesCanadaBrazilEuropeOthers
Current service cost105 29 — 69 
Past service cost - Plan amendments31 — 28 — — 
Net interest cost (income) on net DB liability (asset)55 — 14 12 22 
Total191 71 84 28 
 Year ended December 31, 2020
Net periodic pension cost (income)TotalUnited StatesCanadaBrazilEuropeOthers
Current service cost129 28 25 — 64 12 
Past service cost - Plan amendments(1)— — 
Past service cost - Curtailments— — — — 
Net interest cost/(income) on net DB liability (asset)88 26 13 21 23 
Total225 55 41 89 35 
 Year ended December 31, 2019
Net periodic pension cost (income)TotalUnited StatesCanadaBrazilEuropeOthers
Current service cost114 26 21 — 58 
Past service cost - Plan amendments— — — 
Past service cost - Settlements(26)— — (26)— — 
Net interest cost (income) on net DB liability (asset)112 35 19 32 22 
Total204 61 40 (20)92 31 
The following tables detail the components of net periodic other post-employment cost:
 Year ended December 31, 2021
Components of net periodic OPEB cost (income)TotalUnited StatesCanadaEuropeOthers
Current service cost— (1)
Past service cost - Plan amendments(57)— (58)— 
Past service cost - Curtailments(7)— — (7)— 
Net interest cost (income) on net DB liability (asset)25 18 
Actuarial gain recognized during the year(14)— (1)(13)— 
Total(44)17 (69)

 Year ended December 31, 2020
Components of net periodic OPEB cost (income)TotalUnited StatesCanadaEuropeOthers
Current service cost85 44 10 27 
Past service cost - Plan amendments(1)— (1)— — 
Past service cost - Curtailments— — — 
Net interest cost (income) on net DB liability (asset)110 79 19 
Actuarial losses recognized during the year— — — 
Total205 126 28 42 

 Year ended December 31, 2019
Components of net periodic OPEB cost (income)TotalUnited StatesCanadaEuropeOthers
Current service cost80 40 28 
Net interest cost (income) on net DB liability (asset)143 104 22 11 
Actuarial losses recognized during the year— — — 
Total231 144 31 47 
Expenses recognized in the Consolidated Statement of Operations
The following tables detail where the expense is recognized in the consolidated statements of operations:
 Year ended December 31,
 202120202019
Net periodic pension cost191 225 204 
Net periodic OPEB cost(44)205 231 
Total147 430 435 
Cost of sales72 189 142 
Selling, general and administrative expenses34 30 
Financing costs - net66 207 263 
Total147 430 435 
Schedule of Weighted-average Asset Allocations for the Funded Defined Benefit Pension Plans by Asset Category
The weighted-average asset allocations for the funded defined benefit plans by asset category were as follows:
 December 31, 2021
CanadaBrazilEurope
Equity Securities35 %%%
- Asset classes that have a quoted market price in an active market27 %%%
- Asset classes that do not have a quoted market price in an active market%%— 
Fixed Income Securities (including cash)53 %87 %69 %
- Asset classes that have a quoted market price in an active market49 %87 %69 %
- Asset classes that do not have a quoted market price in an active market%— — 
Real Estate%%— 
- Asset classes that have a quoted market price in an active market— — — 
- Asset classes that do not have a quoted market price in an active market%%— 
Other%%30 %
- Asset classes that have a quoted market price in an active market— %%
- Asset classes that do not have a quoted market price in an active market %— 22 %
'1
Total100 %100 %100 %
 December 31, 2020
CanadaBrazilEurope
Equity Securities47 %%%
- Asset classes that have a quoted market price in an active market39 %%%
- Asset classes that do not have a quoted market price in an active market%%— 
Fixed Income Securities (including cash)46 %77 %72 %
- Asset classes that have a quoted market price in an active market42 %77 %72 %
- Asset classes that do not have a quoted market price in an active market%— — 
Real Estate%%— 
- Asset classes that have a quoted market price in an active market— %— 
- Asset classes that do not have a quoted market price in an active market%— — 
Other%16 %27 %
- Asset classes that have a quoted market price in an active market— 16 %%
- Asset classes that do not have a quoted market price in an active market %— 22 %
'1
Total100 %100 %100 %
1.The percentage consists primarily of assets from insurance contracts in Belgium.
Disclosure of Fair Value of Plan Assets
December 31, 2021
 CanadaBrazilEurope
Equity Securities35 %%%
Fixed Income Securities (including cash)55 %87 %68 %
Real Estate%%— 
Other%%30 %
'1
Total100 %100 %100 %
1.The percentage consists primarily of assets from insurance contracts in Belgium.
Actuarial Assumptions for Defined Benefit Obligations
Assumptions used to determine benefit obligations at December 31,
 Pension Plans  Other Post-employment Benefits  
 202120202019202120202019
Discount rate      
Range
1.00% - 11.00%
0.50% - 10.00%
1.00% - 10.50%
1.00% - 7.95%
0.50% - 6.20%
1.00% - 7.25%
Weighted average
2.75%
2.13%
2.90%
2.65%
1.84%
3.06%
Rate of compensation increase   
Range
2.00% - 10.00%
1.72% - 10.00%
1.90% - 10.00%
2.00% - 4.80%
1.30% - 4.80%
1.60% - 4.80%
Weighted average
2.87%
2.71%
2.80%
3.14%
2.85%
2.95%
Disclosure of Defined Benefit Plans
 Other Post-employment Benefits
 202120202019
Healthcare cost trend rate assumed   
Range
1.30% - 4.50%
1.40% - 4.50%
1.80% - 5.00%
Weighted average
3.95%
3.94%
4.42%
Disclosure of Sensitivity Analysis for Actuarial Assumptions
The following information illustrates the sensitivity to a change of the significant actuarial assumptions related to ArcelorMittal’s pension plans (as of December 31, 2021, the defined benefit obligation for pension plans was 6,739):
Effect on 2022 Pre-Tax Pension Expense (sum of service cost and interest cost)Effect on December 31, 2021 DBO
Change in assumption  
100 basis points decrease in discount rate
(27)955 
100 basis points increase in discount rate
21 (764)
100 basis points decrease in rate of compensation
(14)(182)
100 basis points increase in rate of compensation
15 182 
1 year increase of the expected life of the beneficiaries
192 
The following table illustrates the sensitivity to a change of the significant actuarial assumptions related to ArcelorMittal’s OPEB plans (as of December 31, 2021 the defined benefit obligation for post-employment benefit plans was 1,190):
Effect on 2022 Pre-Tax OPEB Expense (sum of service cost and interest cost)Effect on December 31, 2021 DBO
Change in assumption  
100 basis points decrease in discount rate
(1)179 
100 basis points increase in discount rate
(142)
100 basis points decrease in healthcare cost trend rate
(5)(83)
100 basis points increase in healthcare cost trend rate
104 
1 year increase of the expected life of the beneficiaries
28 
Disclosure of Exercise Prices of Outstanding Share Options
Grant dateExercise prices (per option)  
August 2010$91.98 
Changes in Stock Options Issued
Option activity with respect to ArcelorMittal Shares and ArcelorMittal Global Stock Option Plan 2009-2018 is summarized below as of and for each of the years ended December 31, 2021, 2020 and 2019:
Number of OptionsRange of Exercise Prices
(per option)
Weighted Average Exercise Price
(per option)
Outstanding, December 31, 20181,989,375 
91.98 – 109.14
100.33 
Expired(1,084,985)
91.98 – 109.14
107.29 
Outstanding, December 31, 2019904,390 91.9891.98 
Expired(904,390)91.9891.98 
Outstanding, December 31, 2020— — — 
Exercisable, December 31, 2019904,390 91.9891.98 
Exercisable, December 31, 2020— — — 
Exercisable, December 31, 2021— — — 
Terms and Conditions of Share-based Payment Arrangements
Conditions of the 2021 grant were as follows:
Executive officeExecutive Officers
2021 Grantl
PSUs with a three year performance period
l
PSUs with a three year performance period
l
Value at grant 100% of base salary for the Executive Chairman and the CEO
lVesting conditions:lVesting conditions
ThresholdTargetTargetStretch
TSR vs. peer group (50%) / EPS vs. peer group (20%)

100% median
≥120% median
TSR vs. peer group (40%)
100% weighted average
≥120% weighted average
Vesting percentage
50%
100%
Vesting percentage
100%
150%
Gap to competition (40%)
100% of target
120% of target
ESG (30%)
100% of target
Vesting percentage
100%
150%
ESG
(20%)
100% of target
120% of target
Vesting percentage
100%
100%
150%
l
RSUs with a three year vesting period
l
RSUs with a two year vesting period
he summary of outstanding plans as of December 31, 2021 is as follows:
Executive office
2016 Special Grantl
PSUs with a five year performance period, 50% vesting after three year performance period and 50% after additional two year performance period
l
Performance criteria: 50% TSR (½ vs. S&P 500 and ½ vs. peer group) and 50% EPS vs. peer group
l
Value at grant: 150% of base salary for the Executive Chairman and the CEO
lVesting conditions:
ThresholdTarget
TSR/EPS vs. peer group
100% median
≥120% median
TSR vs. S&P 500Performance equal to Index
≥Performance equal to Index + 2% p.a. outperformance
Vesting percentage
50%
100%
Executive officeExecutive officers
2018 Grantl
PSUs with a three year performance period
l
PSUs with a three year performance period
l
Value at grant 100% of base salary for the Executive Chairman and the CEO
lVesting conditions:lVesting conditions
ThresholdTarget
TSR/EPS vs. peer group
100% median
≥120% median
ROCE
100% target
100% vesting
TSR vs. S&P 500
Performance equal to Index
≥Performance equal to Index + 2% p.a. outperformance
Gap to competition (where applicable)
100% target
100% vesting
Vesting percentage
50%
100%
Executive officeExecutive officers
2019 Grantl
PSUs with a three year performance period
l
PSUs with a three year performance period
l
Value at grant 100% of base salary for the Executive Chairman and the CEO
lVesting conditions:lVesting conditions:
ThresholdTarget
TSR/EPS vs. peer group
100% median
≥120% median
ROCE
100% target
100% vesting
TSR vs. S&P 500Performance equal to Index
≥Performance equal to Index + 2% p.a. outperformance
Gap to competition (where applicable)
100% target
100% vesting
Vesting percentage
50%
100%
Executive officeExecutive officers
2020 Grantl
PSUs with a three year performance period
l
PSUs with a three year performance period
l
Value at grant 100% of base salary for the Executive Chairman and the CEO
lVesting conditions:lVesting conditions:
ThresholdTargetThresholdTarget
TSR/EPS vs. peer group
100% median
≥120% median
TSR/EPS vs. peer group
100% median
≥120% median
Vesting percentage50%100%
TSR vs. S&P 500Performance equal to Index
≥Performance equal to Index + 2% p.a. outperformance
Gap to competition (where applicable)
100% target
100% vesting
Vesting percentage
50%
100%
Vesting percentage
0%
100%
l
RSUs with a three year vesting period
l
RSUs with a one year vesting period
Summary of Share Unit Plans Outstanding
The following table summarizes the Company’s share unit plans outstanding as of December 31, 2021:
At Grant dateNumber of shares issued as of December 31, 2021
Grant dateType of planNumber of sharesNumber of beneficiariesMaturityFair value
per share
Shares outstandingShares forfeitedShares exited
December 16, 2021RSU729,250 658 December 16, 202432.66 729,250 — — 
December 16, 2021PSU575,400 244 January 1, 202528.29 575,400 — — 
December 16, 2021Executive Office109,143 January 1, 202527.20 109,143 — — 
May 7, 2021RSU350,000 189 May 7, 202332.55 336,500 12,194 1,306 
December 14, 2020RSU1,074,600 656 December 14, 202321.15 1,029,200 41,628 3,772 
December 14, 2020PSU714,250 235 January 1, 202419.74 687,250 27,000 — 
December 14, 2020Executive Office148,422 January 1, 202418.19 148,422 — — 
December 16, 2019PSU1,760,350 517 January 1, 202318.57 1,381,750 202,850 175,750 
December 16, 2019Executive Office172,517 January 1, 202314.89 172,517 — — 
December 20, 2018PSU1,358,750 524 January 1, 202221.31 943,200 293,300 122,250 
December 20, 2018Executive Office134,861 January 1, 202216.58 134,861 — — 
June 30, 2016Executive Office153,268 January 1, 202216.62 153,268 — — 
Total7,280,811 
$14.89 – $32.66
6,400,761 576,972 303,078 
Schedule of Share Unit Plan Activity
Share unit plan activity is summarized below as of and for each year ended December 31, 2021, 2020 and 2019:
RSUsPSUs
Number of sharesFair value per shareNumber of sharesFair value per share
Outstanding, December 31, 2018— — 9,370,460 15.34 
Granted 1
— — 2,018,176 17.96 
Exited— — (2,677,011)13.49 
Forfeited— — (1,239,569)14.25 
Outstanding, December 31, 2019— — 7,472,056 16.76 
Granted 1,391,284 21.15 862,672 19.47 
Exited— — (658,141)16.86 
Forfeited— — (526,420)15.48 
Outstanding, December 31, 20201,391,284 21.15 7,150,167 17.18 
Granted1,079,250 32.62 684,543 28.12 
Exited(315,699)21.20 (613,385)14.04 
Forfeited(59,885)23.47 (2,915,514)15.37 
Outstanding, December 31, 20212,094,950 26.99 4,305,811 20.58 
1.Including 85,309 over-performance shares granted for the targets achievement of the PSU grant December 18, 2015.