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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%