XML 97 R81.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Pension and Other Postretirement Benefits (Details 4) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Pooled Property Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] |  | Fair Value Measured at Net Asset Value Per Share [Member] |
Funds measured at NAV |  |  |
Pension and Other Postretirement Benefits |  |  |
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] | Fair Value Measured at Net Asset Value Per Share [Member] |  |
United Kingdom | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | $ 505 | $ 491 | $ 418
United Kingdom | Pension Plans | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 122 |  |
United Kingdom | Pension Plans | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 22 |
United Kingdom | Pension Plans | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 118 |
United Kingdom | Pension Plans | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 73 |
United Kingdom | Pension Plans | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 88 |
United Kingdom | Pension Plans | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 67 | 83 |
United Kingdom | Pension Plans | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 78 |  |
United Kingdom | Pension Plans | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 88 |  |
United Kingdom | Pension Plans | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 52 | 55 |
United Kingdom | Pension Plans | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 15 |  |
United Kingdom | Pension Plans | Pooled Property Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 52 |
United Kingdom | Pension Plans | Funds measured at NAV |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 83 |  |
United Kingdom | Pension Plans | Fair Value, Inputs, Level 1, 2 and 3 |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 422 | 439 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 8 | 5 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 5 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 8 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 414 | 434 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 122 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 17 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 118 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 73 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 88 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 67 | 83 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 78 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 88 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 52 | 55 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 7 |  |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 830 | 846 | $ 790
North America | Pension Plans | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 14 | 30 |
North America | Pension Plans | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 157 | 134 |
North America | Pension Plans | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 34 | 30 |
North America | Pension Plans | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 7 | 7 |
North America | Pension Plans | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 103 | 110 |
North America | Pension Plans | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 460 | 499 |
North America | Pension Plans | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 61 | 37 |
North America | Pension Plans | Accruals and payables—net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | (6) |  |
North America | Pension Plans | Accruals and payables—net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | (1) |
North America | Pension Plans | Fair Value, Inputs, Level 1, 2 and 3 | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 836 | 847 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 228 | 178 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 10 | 7 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 157 | 134 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 61 | 37 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 608 | 669 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 4 | 23 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 34 | 30 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 7 | 7 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 103 | 110 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 460 | 499 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | $ 0 | $ 0 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + 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 (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Indicates level within fair value hierarchy and fair value measured at net asset value per share as practical expedient, of defined benefit plan asset. + 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 (d)(iv)(03) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsFairValueByHierarchyAndNavExtensibleList
Namespace Prefix: | us-gaap_
Data Type: | enum2:enumerationSetItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_PooledPropertyFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_TwoFundsWithExposureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_PooledEquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanCashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_PooledTargetReturnFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_FixedIncomePooledUKGovernmentIndexLinkedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_FixedIncomePooledFixedIncomeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_LiabilitydriveninvestmentfundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_PooledUKGovernmentSecuritiesFundsIndexLinkedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_PooledGlobalDebtFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_PooledDiversifiedFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_CashAndCashFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel12And3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=srt_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_IndexEquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_OtherPlanAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_DefinedBenefitPlanAccrualsAndPayablesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_DefinedBenefitPlanReceivablesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cf_DefinedBenefitPlanAssetsBeforeReceivablesAccrualsAndPayablesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |