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Pensions and Other Benefits (Tables)
 12 Months Ended
Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Details Relating to Pension Benefits and Other Benefits Details relating to pension benefits and Other Benefits are below.
Pension BenefitsOther Benefits
(In millions)2021202020212020
Change in benefit obligations
Benefit obligations at January 1$6,186 $5,822 $1,841 $1,876 
Service cost53 51 11 12 
Interest cost163 193 50 63 
UPI acquisition— 246 — 56 
Actuarial losses (gains)(202)400 (171)(23)
Exchange rate loss(3)3 — — 
Settlements, curtailments and termination benefits(358)4 19 4 
Benefits paid(417)(533)(130)(147)
Benefit obligations at December 31$5,422 $6,186 $1,620 $1,841 
Change in plan assets
Fair value of plan at January 1$6,035 $5,406 $2,111 $2,025 
Actual return on plan assets394 922 70 219 
UPI acquisition— 238 — 1 
Asset reversion— — (4)(38)
Employer contributions— — 2 1 
Settlements(380)— — — 
Benefits paid from plan assets(417)(531)(85)(97)
Fair value of plan assets at December 31$5,632 $6,035 $2,094 $2,111 
Funded status of plans at December 31210 (151)474 270 
Amounts Recognized in Accumulated Other Comprehensive Loss
Amounts recognized in accumulated other comprehensive loss:
2021
(In millions)12/31/2020AmortizationActivity12/31/2021
Pensions
Prior Service Cost$14 $(2)$— $12 
Actuarial Losses1,764 (231)(237)1,296 
Other Benefits
Prior Service Credit(103)29 — (74)
Actuarial Gains(556)23 (160)(693)
(In millions) (a)
Amount reclassified from AOCI
Details about AOCI components202120202019
Amortization of pension and other benefit items
Prior service costs (a)
$(27)$(4)$31 
Actuarial losses (a)
109 129 135 
Settlements, termination and curtailment gains (a)
100 2 3 
UPI purchase accounting adjustment— 23 — 
Total pensions and other benefits items182 150 169 
Derivative reclassifications to Consolidated Statements of Operations105 32 22 
Total before tax287 182 191 
Tax provision(72)(41)(48)
Net of tax$215 $141 $143 
(a)These AOCI components are included in the computation of net periodic benefit cost (see Note 18 for additional details).
Pension and Other Benefits Recognized in Balance Sheet
As of December 31, 2021 and 2020, the following amounts were recognized in the Consolidated Balance Sheet:
Pension BenefitsOther Benefits
(In millions)2021202020212020
Noncurrent assets (a)
252 12 535 326 
Current liabilities(1)(9)(3)(4)
Noncurrent liabilities(41)(154)(59)(52)
Accumulated other comprehensive loss (b)
1,308 1,778 (767)(659)
Net amount recognized$1,518 $1,627 $(294)$(389)
(a)    Included in noncurrent assets for Other Benefits are $41 million of expected retiree medical and life insurance payments for the next twelve months.
(b)    Accumulated other comprehensive loss effects associated with accounting for pensions and other benefits in accordance with ASC Topic 715 at December 31, 2021 and December 31, 2020, respectively, are reflected net of tax of $531 million and $678 million respectively, on the Consolidated Statements of Stockholders’ Equity.
Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets
The Accumulated Benefit Obligation (ABO) for all defined benefit pension plans was $5,274 million and $5,979 million at December 31, 2021 and 2020, respectively.
December 31,
(In millions)20212020
Information for pension plans with an accumulated benefit obligation in excess of plan assets:
Aggregate accumulated benefit obligations (ABO)$(294)$(5,979)
Aggregate projected benefit obligations (PBO)(309)(6,186)
Aggregate fair value of plan assets268 6,035 
Details of Net Periodic Benefit Costs Related to Pension and Other Benefits
Following are the details of net periodic benefit costs related to Pension and Other Benefits:
Pension BenefitsOther Benefits
(In millions)202120202019202120202019
Components of net periodic benefit cost (credits):
Service cost$53 $51 $44 $11 $12 $13 
Interest cost163 193 237 50 63 91 
Expected return on plan assets(361)(333)(324)(81)(80)(79)
Amortization - prior service costs (credits)2 2 2 (29)(6)29 
- actuarial losses (gains)132 145 132 (23)(16)3 
Net periodic benefit cost, excluding below(11)58 91 (72)(27)57 
Multiemployer plans (a)
75 76 77 — — — 
Settlement, termination and curtailment losses135 11 11 19 4 — 
Net periodic benefit cost (credits)$199 $145 $179 $(53)$(23)$57 
(a)    Primarily represents pension expense for the SPT covering USW employees hired from National Steel Corporation and new USW employees hired after May 21, 2003.
Assumptions used to Determine Benefit Obligation and Net Periodic Benefit Cost
Weighted average assumptions used to determine the benefit obligation at December 31 and net periodic benefit cost for the year ended December 31 are detailed below.
Pension BenefitsOther Benefits
2021202020212020
U.S. and EuropeU.S. and EuropeU.S.U.S.
Actuarial assumptions used to determine benefit obligations at December 31:
Discount rate3.01 %2.72 %3.11 %2.80 %
Increase in compensation rate2.60 %2.62 %N/AN/A

Pension BenefitsOther Benefits
202120202019202120202019
U.S. and EuropeU.S. and EuropeU.S. and EuropeU.S. U.S. U.S.
Actuarial assumptions used to determine net periodic benefit cost for the year ended December 31:
Discount rate2.72 %3.35 %4.41 %2.80 %3.42 %4.47 %
Expected annual return on plan assets6.82 %6.47 %6.50 %4.25 %4.25 %4.25 %
Increase in compensation rate2.60 %2.62 %2.60 %N/AN/AN/A
Assumed Health Care Cost Trend Rates
20212020
Assumed health care cost trend rates at December 31:U.S.U.S.
Health care cost trend rate assumed for next year5.75%6.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)4.50%4.50%
Year that the rate reaches the ultimate trend rate20292029
Pension and Other Benefits Plan Assets Carried at Fair Value
The fair value of U. S. Steel's pension plan assets by asset category at December 31 were as follows (in millions):

20212020
Level 1Level 2Level 3
measured at NAV (a)
TotalLevel 1Level 2Level 3
measured at NAV (a)
Total
Asset Category
Equity
U. S. companies$433 $— $— $— $433 $306 $— $— $— $306 
International companies183 — — — 183 177 — — — 177 
Total equity616 — — — 616 483 — — — 483 
Fixed Income
Corporate Bonds - U.S.— 1,405 — — 1,405 — 1,514 — — 1,514 
Corporate Bonds - Non-U.S.— 251 — — 251 — 252 — — 252 
U.S. government and agencies— 426 — — 426 — 202 — — 202 
Non-U.S. government— 78 — — 78 — 97 — — 97 
Mortgage and asset-backed securities— 1 — — 1 — 213 — — 213 
Total fixed income— 2,161 — — 2,161 — 2,278 — — 2,278 
Alternatives
Timberlands— — — 268 268 — — 269 — 269 
Mineral Interests and other alternatives— — 22 9 31 — — 19 — 19 
Private equity— — — 259 259 — — — 231 231 
Real estate— — 32 187 219 — — 36 205 241 
Total alternatives— — 54 723 777 — — 324 436 760 
Commingled Funds— — — 1,964 1,964 — — — 2,289 2,289 
Short-Term Investments117 — — — 117 173 — — — 173 
Other (b)
(3)— — — (3)52 — — — 52 
Total assets at fair value$730 $2,161 $54 $2,687 $5,632 $708 $2,278 $324 $2,725 $6,035 
(a)In accordance with ASC Topic 820, certain investments that were measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.
(b)Includes cash, accrued income, and miscellaneous payables.
The fair value of U. S. Steel's Other Benefits plan assets by asset category at December 31 were as follows (in millions):

20212020
Level 1Level 2Level 3
measured at NAV (a)
TotalLevel 1Level 2Level 3
measured at NAV (a)
Total
Asset Category
Equity
U. S. companies$186 $— $— $— $186 $77 $— $— $— $77 
International companies97 — — — 97 27 — — — 27 
Total equity283 — — — 283 104 — — — 104 
Fixed Income
Corporate Bonds - U.S.— 718 — — 718 — 1,121 — — 1,121 
Corporate Bonds - Non-U.S.— 191 — — 191 — 231 — — 231 
U.S. government and agencies— 198 — — 198 — 365 — — 365 
Non-U.S. government— 17 — — 17 — 9 — — 9 
Mortgage and asset-backed securities— 9 — — 9 — 31 — — 31 
Total fixed income— 1,133 — — 1,133 — 1,757 — — 1,757 
Alternatives
Timberlands— — — 35 35 — — 35 — 35 
Other alternatives— — 39 2 41 — — — — — 
Private equity— — — 59 59 — — — 48 48 
Real estate— — — 26 26 — — — 29 29 
Total alternatives— — 39 122 161 — — 35 77 112 
Commingled Funds— — — 434 434 — — — — — 
Short-Term Investments71 — — — 71 102 — — — 102 
Other (b)
12 — — — 12 36 — — — 36 
Total assets at fair value$366 $1,133 $39 $556 $2,094 $242 $1,757 $35 $77 $2,111 
(a)In accordance with ASC Topic 820, certain investments that were measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.
(b)Includes cash, accrued income, and miscellaneous payables.
Changes in Fair Value of Pension and Other Benefits Plan Level 3 Assets
The following table sets forth a summary of changes in the fair value of U. S. Steel’s Pension plan Level 3 assets for the years ended December 31, 2021 and 2020:

Level 3 assets only
(In millions)20212020
Balance at beginning of period$324 $317 
Transfers in and/or out of Level 3(269)— 
Actual return on plan assets:
Realized gain3 2 
Net unrealized loss2 (9)
Purchases, sales, issuances and settlements:
Purchases24 17 
Sales(30)(3)
Balance at end of period$54 $324 
The following table sets forth a summary of changes in the fair value of U. S. Steel’s Other Benefits plan Level 3 assets for the years ended December 31, 2021 and 2020:

Level 3 assets only
(In millions)20212020
Balance at beginning of period$35 $35 
Transfers in and/or out of Level 3(35)— 
Actual return on plan assets:
Realized gain— — 
Net unrealized loss1 — 
Purchases, sales, issuances and settlements:
Purchases39 2 
Sales(1)(2)
Balance at end of period$39 $35 
Multiemployer Pension Plans
U. S. Steel’s participation in the SPT for the annual periods ended December 31, 2021, 2020 and 2019 is outlined in the table below.

Employer
Identification
Number/
Pension Plan
Number
Pension
Protection
Act Zone
Status as of
December 31 (a)
FIP/RP Status
Pending/Implemented(b)
U.S. Steel
Contributions
(in millions)
Surcharge
Imposed(c)
Expiration Date
of Collective
Bargaining
Agreement
Pension Fund2021202020212020201920212020
Steelworkers Pension Trust23-6648508/499GreenGreenNo$75 $76 $77 NoNoSeptember 1, 2022
(a)The zone status is based on information that U. S. Steel received from the plan and is certified by the plan’s actuary. Among other factors, plans in the green zone are at least 80 percent funded, while plans in the yellow zone are less than 80 percent funded and plans in the red zone are less than 65 percent funded.
(b)Indicates if a financial improvement plan (FIP) or a rehabilitation plan (RP) is either pending or has been implemented.
(c)Indicates whether there were charges to U. S. Steel from the plan.
Benefit Payments Expected to be Paid from Defined Benefit Plans
Estimated Future Benefit Payments – The following benefit payments, which reflect expected future service as appropriate, are expected to be paid from U. S. Steel’s defined benefit plans:

(In millions)Pension
Benefits		Other
Benefits
2022$407 $135 
2023397 130 
2024427 127 
2025378 127 
2026368 126 
Years 2027 - 20291,690 562