ÐÇ¿Õ´«Ã½

Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT BENEFITS - Obligations and Funded Status (Details)

v3.22.0.1
PENSION AND OTHER POSTRETIREMENT BENEFITS - Obligations and Funded Status (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 09, 2020
Mar. 13, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Amounts recognized in accumulated other comprehensive loss (income): Ìý Ìý Ìý Ìý Ìý
Accumulated benefit obligation Ìý Ìý $ 6,013 $ 6,537 Ìý
AK Steel Ìý Ìý Ìý Ìý Ìý
Change in benefit obligations: Ìý Ìý Ìý Ìý Ìý
Acquired through business combinations Ìý $ 949 Ìý Ìý Ìý
ArcelorMittal USA Ìý Ìý Ìý Ìý Ìý
Change in benefit obligations: Ìý Ìý Ìý Ìý Ìý
Acquired through business combinations $ 3,294 Ìý Ìý Ìý Ìý
Pension Plan Ìý Ìý Ìý Ìý Ìý
Change in benefit obligations: Ìý Ìý Ìý Ìý Ìý
Benefit obligations — beginning of year Ìý Ìý 6,565 1,021 Ìý
Service cost Ìý Ìý 56 23 $ 17
Interest cost Ìý Ìý 103 64 35
Plan amendments Ìý Ìý 0 0 Ìý
Actuarial loss (gain) Ìý Ìý (131) 162 Ìý
Benefits paid Ìý Ìý (456) (146) Ìý
Participant contributions Ìý Ìý 0 0 Ìý
Acquired through business combinations Ìý Ìý 0 5,535 Ìý
Effect of settlement Ìý Ìý (101) (94) Ìý
Benefit obligations — end of year Ìý Ìý 6,036 6,565 1,021
Change in plan assets: Ìý Ìý Ìý Ìý Ìý
Fair value of plan assets — beginning of year Ìý Ìý 5,332 749 Ìý
Actual return on plan assets Ìý Ìý 668 472 Ìý
Participant contributions Ìý Ìý 0 0 Ìý
Employer contributions Ìý Ìý 155 50 Ìý
Benefits paid Ìý Ìý (454) (146) Ìý
Acquired through business combinations Ìý Ìý 0 4,301 Ìý
Effect of settlement Ìý Ìý (95) (94) Ìý
Fair value of plan assets — end of year Ìý Ìý 5,606 5,332 749
Funded status Ìý Ìý (430) (1,233) Ìý
Amounts recognized in Statements of Financial Position: Ìý Ìý Ìý Ìý Ìý
Non-current assets Ìý Ìý 153 3 Ìý
Current liabilities Ìý Ìý (5) (12) Ìý
Non-current liabilities Ìý Ìý (578) (1,224) Ìý
Total amount recognized Ìý Ìý (430) (1,233) Ìý
Amounts recognized in accumulated other comprehensive loss (income): Ìý Ìý Ìý Ìý Ìý
Net actuarial loss (gain) Ìý Ìý (286) 164 Ìý
Prior service cost (credit) Ìý Ìý 5 6 Ìý
Net amount recognized Ìý Ìý (281) 170 Ìý
Other Postretirement Benefits Plan Ìý Ìý Ìý Ìý Ìý
Change in benefit obligations: Ìý Ìý Ìý Ìý Ìý
Benefit obligations — beginning of year Ìý Ìý 3,757 255 Ìý
Service cost Ìý Ìý 51 8 2
Interest cost Ìý Ìý 74 19 10
Plan amendments Ìý Ìý 8 0 Ìý
Actuarial loss (gain) Ìý Ìý (456) 14 Ìý
Benefits paid Ìý Ìý (227) (89) Ìý
Participant contributions Ìý Ìý 47 22 Ìý
Acquired through business combinations Ìý Ìý 0 3,528 Ìý
Effect of settlement Ìý Ìý 0 0 Ìý
Benefit obligations — end of year Ìý Ìý 3,254 3,757 255
Change in plan assets: Ìý Ìý Ìý Ìý Ìý
Fair value of plan assets — beginning of year Ìý Ìý 783 260 Ìý
Actual return on plan assets Ìý Ìý 29 45 Ìý
Participant contributions Ìý Ìý 26 17 Ìý
Employer contributions Ìý Ìý 139 30 Ìý
Benefits paid Ìý Ìý (165) (88) Ìý
Acquired through business combinations Ìý Ìý 0 519 Ìý
Effect of settlement Ìý Ìý 0 0 Ìý
Fair value of plan assets — end of year Ìý Ìý 812 783 $ 260
Funded status Ìý Ìý (2,442) (2,974) Ìý
Amounts recognized in Statements of Financial Position: Ìý Ìý Ìý Ìý Ìý
Non-current assets Ìý Ìý 71 54 Ìý
Current liabilities Ìý Ìý (130) (139) Ìý
Non-current liabilities Ìý Ìý (2,383) (2,889) Ìý
Total amount recognized Ìý Ìý (2,442) (2,974) Ìý
Amounts recognized in accumulated other comprehensive loss (income): Ìý Ìý Ìý Ìý Ìý
Net actuarial loss (gain) Ìý Ìý (392) 56 Ìý
Prior service cost (credit) Ìý Ìý 4 (6) Ìý
Net amount recognized Ìý Ìý $ (388) $ 50 Ìý