XML 48 R36.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Employee Benefits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Retirement Benefits [Abstract] |
Schedule of Assumptions Used for Benefit Obligation | Key Assumptions. The following table presents the weighted average assumptions used to determine benefit obligations:
|  | Pension Plans 1 |  |  | OPEB |  |  | Salaried VEBA |
|  | As of December 31, |  |  | As of December 31, |  |  | As of December 31, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Discount rate |  |  | 5.54 | % |  |  | 4.95 | % |  |  | 5.48 | % |  |  | 4.92 | % |  |  | 5.40 | % |  |  | 4.89 | %
Rate of compensation increase |  |  | 2.56 | % |  |  | 2.63 | % |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | %
1. Assumptions for our pension plans are weighted based on the total benefit obligations of each.
Schedule of Assumptions Used to Determine Net Periodic Postretirement and Postemployment Benefit Cost | The following table presents the weighted average assumptions used to determine net periodic postretirement and postemployment benefit cost:
|  | Pension Plans 1 |  |  | OPEB |  |  | Salaried VEBA |
|  | Year Ended December 31, |  |  | Year Ended December 31, |  |  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |  |  | 2022 |  |  | 2024 |  |  | 2023 |  |  | 2022 |  |  | 2024 |  |  | 2023 |  |  | 2022 |
Discount rate |  |  | 5.00 | % |  |  | 5.19 | % |  |  | 2.90 | % |  |  | 4.92 | % |  |  | 5.14 | % |  |  | 2.64 | % |  |  | 4.89 | % |  |  | 5.10 | % |  |  | 2.49 | %
Expected long-term return on plan assets 2 |  |  | 6.31 | % |  |  | 6.33 | % |  |  | 6.02 | % |  |  | — | % |  |  | — | % |  |  | — | % |  |  | 5.75 | % |  |  | 5.75 | % |  |  | 5.50 | %
Rate of compensation increase |  |  | 2.56 | % |  |  | 2.63 | % |  |  | 2.69 | % |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | %
1. Assumptions for our pension plans are weighted based on the total benefit obligations of each. 2. The expected long-term rate of return assumption for the Salaried VEBA is based on the targeted investment portfolios provided to us by the trustee of the Salaried VEBA.
Schedule of Changes in Benefit Obligations | The following table presents the benefit obligations and funded status of our pension plans, OPEB, and the Salaried VEBA and the corresponding amounts that are included in our Consolidated Balance Sheets (in millions of dollars):
|  | Pension Plans |  |  | OPEB |  |  | Salaried VEBA |
|  | As of December 31, |  |  | As of December 31, |  |  | As of December 31, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligation at beginning of year |  | $ | 30.5 |  |  | $ | 18.8 |  |  | $ | 68.8 |  |  | $ | 66.4 |  |  | $ | 46.9 |  |  | $ | 58.9 |
Foreign currency translation adjustment |  |  | (0.5 | ) |  |  | 0.2 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Service cost |  |  | 3.6 |  |  |  | 3.8 |  |  |  | 1.1 |  |  |  | 1.1 |  |  |  | — |  |  |  | — |
Interest cost |  |  | 1.6 |  |  |  | 1.3 |  |  |  | 3.3 |  |  |  | 3.4 |  |  |  | 2.2 |  |  |  | 2.9 |
Prior service cost (credit)1 |  |  | 2.2 |  |  |  | 6.6 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (8.8 | )
Actuarial (gain) loss 2 |  |  | (1.6 | ) |  |  | 0.2 |  |  |  | (6.8 | ) |  |  | (0.7 | ) |  |  | (1.4 | ) |  |  | 0.4 |
Plan participants contributions |  |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.2 |  |  |  | 0.1 |  |  |  | — |  |  |  | — |
Benefits paid |  |  | (0.7 | ) |  |  | (0.5 | ) |  |  | (1.9 | ) |  |  | (1.5 | ) |  |  | (4.8 | ) |  |  | (6.5 | )
Settlements 3 |  |  | (4.5 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Obligation at end of year 4 |  |  | 30.7 |  |  |  | 30.5 |  |  |  | 64.7 |  |  |  | 68.8 |  |  |  | 42.9 |  |  |  | 46.9 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair market value of plan assets at beginning of year |  |  | 20.5 |  |  |  | 14.9 |  |  |  | — |  |  |  | — |  |  |  | 43.1 |  |  |  | 42.4 |
Foreign currency translation adjustment |  |  | 0.3 |  |  |  | 0.2 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Actual return on assets |  |  | 0.9 |  |  |  | 1.4 |  |  |  | — |  |  |  | — |  |  |  | 3.9 |  |  |  | 6.1 |
Plan participants contributions |  |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.2 |  |  |  | 0.1 |  |  |  | — |  |  |  | — |
Company contributions |  |  | 5.9 |  |  |  | 4.4 |  |  |  | 1.7 |  |  |  | 1.4 |  |  |  | 0.7 |  |  |  | 1.1 |
Benefits paid |  |  | (0.7 | ) |  |  | (0.5 | ) |  |  | (1.9 | ) |  |  | (1.5 | ) |  |  | (4.8 | ) |  |  | (6.5 | )
Settlements 3 |  |  | (4.5 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Fair market value of plan assets at end of year |  |  | 22.5 |  |  |  | 20.5 |  |  |  | — |  |  |  | — |  |  |  | 42.9 |  |  |  | 43.1 |
Net funded status 5 |  | $ | (8.2 | ) |  | $ | (10.0 | ) |  | $ | (64.7 | ) |  | $ | (68.8 | ) |  | $ | — |  |  | $ | (3.8 | )
Cumulative gain (loss) recognized in Accumulated other comprehensive income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated net actuarial gain |  | $ | 4.2 |  |  | $ | 1.3 |  |  | $ | 23.1 |  |  | $ | 17.4 |  |  | $ | 8.2 |  |  | $ | 5.2 |
Prior service cost |  |  | (7.6 | ) |  |  | (6.1 | ) |  |  | — |  |  |  | — |  |  |  | (14.3 | ) |  |  | (16.0 | )
Total |  | $ | (3.4 | ) |  | $ | (4.8 | ) |  | $ | 23.1 |  |  | $ | 17.4 |  |  | $ | (6.1 | ) |  | $ | (10.8 | )
1. The prior service cost relating to our pension plans in 2024 resulted from an amendment to the Kaiser Aluminum Warrick pension plan clarifying certain plan provisions going back to the date of our acquisition of Warrick. The prior service cost relating to our pension plans in 2023 resulted from a new four-year collective bargaining agreement with the USW Local 104. In connection with the agreement, we amended the Kaiser Aluminum Warrick pension plan to increase certain pension benefits for covered plan participants. The prior service credit relating to the Salaried VEBA in 2023 resulted from a decrease in the annual healthcare reimbursement benefit for plan participants. 2. The actuarial gain relating to our pension plans in 2024 was comprised of a $2.2 million gain due to a change in the discount rate, partially offset by a $0.3 million loss due to changes in census information and a $0.3 million loss recognized in conjunction with a group annuity purchase. The actuarial loss relating to our pension plans in 2023 was comprised of a $0.5 million loss due to a change in the discount rate and a $0.3 million gain due to changes in census information. The actuarial gain relating to the OPEB in 2024 was comprised of a $6.5 million gain due to changes in census information, a $3.3 million gain due to a change in the discount rate, a $3.2 million gain due to a change in morbidity assumptions, a $3.3 million loss due to a change in the trend rate assumption, and a $2.9 million loss due to a change in the projected depletion year. The actuarial gain relating to the OPEB in 2023 was comprised of a $2.7 million gain due to a change in the projected depletion year, a $2.5 million gain due to changes in census information, a $3.1 million loss due to a change in the trend rate assumption, and a $1.4 million loss due to a change in the discount rate. The actuarial gain relating to the Salaried VEBA in 2024 was comprised of a $1.4 million gain due to a change in the discount rate, a $0.1 million gain due to changes in census information, and a $0.1 million loss due to a change in the trend rate assumption. The actuarial loss relating to the Salaried VEBA in 2023 was comprised of a $0.7 million loss due to a change in the discount rate and a $0.3 million gain due to changes in census information. 3. In the fourth quarter of 2024, we entered into a group annuity purchase agreement under which approximately $4.5 million of obligations for certain participants of the Kaiser Aluminum Canada Limited Retirement Plan for Salaried Employees were transferred to an insurance company. The annuitization was funded through existing plan assets and does not change the amount of the monthly pension benefits received by the affected participants. 4. For the pension plans, the benefit obligation is the projected benefit obligation. For the Salaried VEBA and OPEB, the benefit obligation is the APBO. 5. At December 31, 2024, Net funded status relating to the pension plans consisted of $1.6 million within Other assets and $9.8 million within Pension and OPEB on our Consolidated Balance Sheets. At December 31, 2023, Net funded status relating to the pension plans consisted of $1.3 million within Other assets and $11.3 million within Pension and OPEB on our Consolidated Balance Sheets. Of the Net funded status relating to the OPEB at December 31, 2024, $3.1 million was included within Accrued salaries, wages and related expenses and $61.6 million was i ncluded within Pension and OPEB on our Consolidated Balance Sheets. Of the Net funded status relating to the OPEB at December 31, 2023, $3.3 million was included within Accrued salaries, wages and related expenses and $65.5 million was included within Pension and OPEB on our Consolidated Balance Sheets. Net funded status relating to the Salaried VEBA at December 31, 2024 and December 31, 2023 was included within Net liabilities of Salaried VEBA on our Consolidated Balance Sheets.
Schedule of Expected Benefit Payments | The following table presents the net benefits expected to be paid (in millions of dollars):
|  | Year Ended December 31, |
|  | 2025 |  |  | 2026 |  |  | 2027 |  |  | 2028 |  |  | 2029 |  |  | 2030-2034 |
Pension benefit payments |  | $ | 0.7 |  |  | $ | 0.9 |  |  | $ | 1.1 |  |  | $ | 1.3 |  |  | $ | 1.7 |  |  | $ | 11.7 |
Salaried VEBA benefit payments 1 |  |  | 5.3 |  |  |  | 5.1 |  |  |  | 4.9 |  |  |  | 4.6 |  |  |  | 4.3 |  |  |  | 16.9 |
OPEB payments |  |  | 3.1 |  |  |  | 3.8 |  |  |  | 4.4 |  |  |  | 5.1 |  |  |  | 5.8 |  |  |  | 34.8 |
Total |  | $ | 9.1 |  |  | $ | 9.8 |  |  | $ | 10.4 |  |  | $ | 11.0 |  |  | $ | 11.8 |  |  | $ | 63.4 |
1. Such amounts are based on benefit amounts and certain key assumptions obtained from the Salaried VEBA trustees and will be paid out of the Salaried VEBA plan assets. We have an ongoing obligation to make variable cash contributions to the Salaried VEBA, up to a maximum of $2.9 million annually based on our cash flow.
Summary of Asset Class Allocation per Pension Plan Investment Policy and Weighted Average Asset Allocation | Plan Assets. The fundamental goal underlying our pension plan investment policy is to ensure that the assets of the plans are invested in a prudent manner to earn a rate of return over time to meet the obligations of the plans as these obligations come due. Risk management practices include diversification across asset classes and periodic rebalancing toward established asset allocation targets. Our investment policy permits variances from the targets within certain parameters. The following table presents the weighted-average target and actual asset class allocations for our pension plans:
Asset class |  | 2024 Target allocation |  | As of December 31, 2024
Equities |  | 56% |  | 55%
Fixed income |  | 38% |  | 38%
Real estate investments |  | 5% |  | 6%
Cash and short-term investments |  | 1% |  | 1%
Schedule of Fair Value of Plan Assets | The following table presents the fair value of plan assets at December 31, 2024 and 2023, classified under the appropriate level of the fair value hierarchy (in millions of dollars):
|  | December 31, 2024 |  |  | December 31, 2023 |  |
Plan Assets in the Fair Value Hierarchy: |  | Level 1 |  |
Salaried VEBA – Equity investment funds in registered investment companies 1 |  | $ | 25.2 |  |  | $ | 25.5 |  |
Salaried VEBA – Fixed income investment funds in registered investment companies 2 |  |  | 16.8 |  |  |  | 16.5 |  |
Salaried VEBA – Cash and money market investments |  |  | 0.2 |  |  |  | — |  |
Pension plans – Diversified investment funds in pooled separate accounts 3 |  |  | 17.1 |  |  |  | 11.2 |  |
Pension plans – Diversified investment funds in registered investment companies 4 |  |  | 5.4 |  |  |  | 9.3 |  |
Deferred compensation program – Diversified investment funds in registered investment companies 4 |  |  | 11.9 |  |  |  | 11.1 |  |
Total plan assets in the fair value hierarchy |  | $ | 76.6 |  |  | $ | 73.6 |  |
1. Equity investment funds in registered investment companies. This category represents investments in equity funds. 2. Fixed income investment funds in registered investment companies. This category represents investments in various fixed income funds with multiple registered investment companies. Such funds invest primarily in bonds, debentures, notes, securities with equity and fixed-income characteristics, cash equivalents, securities backed by mortgages and other assets, loans, pooled or collective investment vehicles made up of fixed‑income securities and other fixed-income obligations of banks, corporations, and governmental authorities. 3. Diversified investment funds in pooled separate accounts. The plan assets are invested in various pooled separate accounts that hold a diversified portfolio of: (i) equity and equity-related securities of U.S. and non-U.S. issuers across all market capitalizations; (ii) fixed income securities such as corporate bonds and government bonds; and (iii) commercial real estate, including mortgage loans which are backed by the associated properties. The pooled separate accounts are valued daily based on the market value of the underlying net assets in each separate account. The majority of the underlying net assets have observable Level 1 pricing inputs which are used to determine the unit value of the pooled separate account which is not publicly quoted. 4. Diversified investment funds in registered investment companies. The assets in the rabbi trust are invested in investment funds that hold a diversified portfolio of: (i) U.S. and international debt and equity securities; (ii) fixed income securities such as corporate bonds and government bonds; (iii) mortgage-related securities; and (iv) cash and cash equivalents.
Schedule of Total Expense Related to Benefit Plans | The following table presents the total expense related to all benefit plans (in millions of dollars):
|  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Defined contribution plans 1 |  | $ | 18.6 |  |  | $ | 18.1 |  |  | $ | 17.1 |
Deferred compensation plan 2 |  |  | 1.3 |  |  |  | 1.2 |  |  |  | (0.6 | )
Multiemployer pension plans 1,3 |  |  | 6.1 |  |  |  | 5.6 |  |  |  | 5.2 |
Net periodic postretirement and postemployment benefit cost relating to defined benefit plans 2,3,4 |  |  | 9.0 |  |  |  | 13.4 |  |  |  | 13.1 |
Total |  | $ | 35.0 |  |  | $ | 38.3 |  |  | $ | 34.8 |
1. Substantially all of these charges related to employee benefits are in COGS with the remaining balance in SG&A and R&D within our Statements of Consolidated Income (Loss). 2. Deferred compensation plan expense and the current service cost component of Net periodic postretirement and postemployment benefit cost relating to Salaried VEBA are included within our Statements of Consolidated Income (Loss) in SG&A and R&D for all periods presented. All other components of Net periodic postretirement and postemployment benefit cost relating to Salaried VEBA are included within Other income, net, in our Statements of Consolidated Income (Loss). 3. See Note 6 for more information on our multiemployer defined benefit pension plans. For the year ended December 31, 2024, the expense presented excludes a $4.6 million charge to Restructuring costs (see Note 12). 4. The current service cost component of Net periodic postretirement and postemployment benefit cost relating to both the pension plans and the OPEB plan is included within COGS in our Statements of Consolidated Income (Loss) for all periods presented. All other components of Net periodic postretirement and postemployment benefit cost relating to both the pension plans and the OPEB plan are included within Other income, net, in our Statements of Consolidated Income (Loss).
Schedule of Net Benefit Costs | The following table presents the components of Net periodic postretirement and postemployment benefit cost relating to our defined benefit plans (in millions of dollars):
|  | Pension Plans |  |  | OPEB |  |  | Salaried VEBA |
|  | Year Ended December 31, |  |  | Year Ended December 31, |  |  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |  |  | 2022 |  |  | 2024 |  |  | 2023 |  |  | 2022 |  |  | 2024 |  |  | 2023 |  |  | 2022 |
Service cost |  | $ | 3.6 |  |  | $ | 3.8 |  |  | $ | 5.8 |  |  | $ | 1.1 |  |  | $ | 1.1 |  |  | $ | 1.6 |  |  | $ | — |  |  |  | — |  |  | $ | 0.1 |
Interest cost |  |  | 1.6 |  |  |  | 1.3 |  |  |  | 0.6 |  |  |  | 3.3 |  |  |  | 3.4 |  |  |  | 2.2 |  |  |  | 2.2 |  |  |  | 2.9 |  |  |  | 1.9 |
Expected return on plan assets |  |  | (1.4 | ) |  |  | (1.1 | ) |  |  | (0.9 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (2.2 | ) |  |  | (2.2 | ) |  |  | (3.1 | )
Amortization of prior service cost 1 |  |  | 0.8 |  |  |  | 0.4 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1.7 |  |  |  | 4.9 |  |  |  | 4.9 |
Amortization of net actuarial gain |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (1.1 | ) |  |  | (1.1 | ) |  |  | — |  |  |  | (0.1 | ) |  |  | — |  |  |  | — |
Settlement gain recognized |  |  | (0.5 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total net periodic postretirement and postemployment benefit cost |  | $ | 4.1 |  |  | $ | 4.4 |  |  | $ | 5.5 |  |  | $ | 3.3 |  |  | $ | 3.4 |  |  | $ | 3.8 |  |  | $ | 1.6 |  |  | $ | 5.6 |  |  | $ | 3.8 |
1. We amortize prior service cost on a straight-line basis over the average remaining years of service of the active plan participants.

X
- Definition Schedule of Assumptions Used for Benefit Obligation [Table Text Block] + References No definition available. + Details
Name: | kalu_ScheduleOfAssumptionsUsedForBenefitObligationTableTextBlock
Namespace Prefix: | kalu_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment allocation of defined benefit plan assets. Includes, but is not limited to, investment allocation percentage or range of percentages. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsAllocationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfAssumptionsUsedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfChangesInProjectedBenefitObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-4 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-2 + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration