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Pension and Other Postretirement Benefits (Details 3) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Retiree Medical |  |  |  |
Assumptions used in determining the benefit obligations and expense: |  |  |  |
Defined benefit plan, pre-65 health care cost trend rate assumed for next fiscal year |  | 7.00% | 6.30% |
Defined benefit plan, pre-65 ultimate health care cost trend rate for 2026 |  | 4.50% | 4.50% |
Defined benefit plan, post-65 health care cost trend rate assumed for next fiscal year |  | 7.50% | 6.80% |
Defined benefit plan, post-65 ultimate health care cost trend rate for 2026 |  | 4.50% | 4.50% |
United States | Pension Plans |  |  |  |
Current target asset allocation |  |  |  |
Defined Benefit Plan Target Allocation Percentage of Assets Non Equity Securities |  | 80.00% |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 20.00% |  |
North America |  |  |  |
Assumptions used in determining the benefit obligations and expense: |  |  |  |
Weighted-average cash balance interest crediting rate—obligation |  | 3.90% | 3.00% | 3.00%
Weighted-average cash balance interest crediting rate—expense |  | 3.00% | 3.00% | 3.00%
Cash balance interest crediting rate for the plan |  | 3.00% |  |
North America | Pension Plans |  |  |  |
Expected future pension and retiree medical benefit payments: |  |  |  |
2023 |  | $ 13 |  |
2024 |  | 14 |  |
2025 |  | 15 |  |
2026 |  | 16 |  |
2027 |  | 17 |  |
2028-2032 |  | $ 89 |  |
Assumptions used in determining the benefit obligations and expense: |  |  |  |
Weighted average discount rate - obligation (as a percent) |  | 5.10% | 2.80% | 2.40%
Weighted average discount rate - expense (as a percent) |  | 3.60% | 2.40% | 3.10%
Weighted average rate of increase in future compensation (as a percent) |  | 3.80% | 4.20% | 4.20%
Weighted average expected long-term rate of return on assets-expense (as a percent) |  | 3.90% | 3.20% | 4.10%
North America | Pension Plans | Subsequent Event |  |  |  |
Assumptions used in determining the benefit obligations and expense: |  |  |  |
Weighted average expected long-term rate of return on assets-expense (as a percent) | 4.80% |  |  |
North America | Retiree Medical |  |  |  |
Expected future pension and retiree medical benefit payments: |  |  |  |
2023 |  | $ 2 |  |
2024 |  | 2 |  |
2025 |  | 2 |  |
2026 |  | 2 |  |
2027 |  | 2 |  |
2028-2032 |  | $ 8 |  |
Assumptions used in determining the benefit obligations and expense: |  |  |  |
Weighted average discount rate - obligation (as a percent) |  | 5.00% | 2.70% | 2.20%
Weighted average discount rate - expense (as a percent) |  | 2.70% | 2.20% | 3.00%
Canada | Pension Plans | CF Canadian Plan |  |  |  |
Current target asset allocation |  |  |  |
Defined Benefit Plan Target Allocation Percentage of Assets Non Equity Securities |  | 80.00% |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 20.00% |  |
Canada | Pension Plans | Terra Canadian Plan |  |  |  |
Current target asset allocation |  |  |  |
Defined Benefit Plan Target Allocation Percentage of Assets Non Equity Securities |  | 100.00% |  |
United Kingdom | Subsequent Event |  |  |  |
Assumptions used in determining the benefit obligations and expense: |  |  |  |
Weighted average expected long-term rate of return on assets-expense (as a percent) | 6.10% |  |  |
United Kingdom | United Kingdom Terra |  |  |  |
Current target asset allocation |  |  |  |
Defined Benefit Plan, Target Plan Asset Allocations, Growth Portfolio |  | 46.00% |  |
Defined Benefit Plan, Target Plan Asset Allocations, Matching Portfolio |  | 54.00% |  |
United Kingdom | United Kingdom Kemira |  |  |  |
Current target asset allocation |  |  |  |
Defined Benefit Plan, Target Plan Asset Allocations, Growth Portfolio |  | 57.00% |  |
Defined Benefit Plan, Target Plan Asset Allocations, Matching Portfolio |  | 43.00% |  |
United Kingdom | Pension Plans |  |  |  |
Expected future pension and retiree medical benefit payments: |  |  |  |
2023 |  | $ 23 |  |
2024 |  | 24 |  |
2025 |  | 25 |  |
2026 |  | 25 |  |
2027 |  | 26 |  |
2028-2032 |  | $ 139 |  |
Assumptions used in determining the benefit obligations and expense: |  |  |  |
Weighted average discount rate - obligation (as a percent) |  | 4.80% | 2.00% | 1.50%
Weighted average discount rate - expense (as a percent) |  | 2.00% | 1.50% | 2.00%
Weighted average expected long-term rate of return on assets-expense (as a percent) |  | 3.40% | 3.30% | 3.40%
Weighted-average retail price index—obligation (as a percent) |  | 3.20% | 3.30% | 3.00%
Weighted-average retail price index—expense (as a percent) |  | 3.30% | 3.00% | 3.00%

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- Definition Represents the target allocation percentage of investments in non-equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. Non-equity securities consist of debt, money market instruments and actively managed portfolios. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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