XML 117 R103.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Postretirement Benefit Plans (Target Allocations) (Details) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Equity securities |  |
Defined Benefit Plan Disclosure |  |
Actual allocation of plan assets | 23.00% | 20.80%
Fixed income |  |
Defined Benefit Plan Disclosure |  |
Actual allocation of plan assets | 21.90% | 22.90%
Hedge funds |  |
Defined Benefit Plan Disclosure |  |
Actual allocation of plan assets | 0.00% | 0.10%
Private equity |  |
Defined Benefit Plan Disclosure |  |
Actual allocation of plan assets | 0.00% | 0.00%
Cash and other |  |
Defined Benefit Plan Disclosure |  |
Actual allocation of plan assets | 55.10% | 56.20%
Minimum | Equity securities |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 15.00% |
Minimum | Fixed income |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 25.00% |
Minimum | Hedge funds |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 0.00% |
Minimum | Private equity |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 0.00% |
Minimum | Cash and other |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 0.00% |
Maximum | Equity securities |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 60.00% |
Maximum | Fixed income |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 50.00% |
Maximum | Hedge funds |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 25.00% |
Maximum | Private equity |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 15.00% |
Maximum | Cash and other |  |
Defined Benefit Plan Disclosure |  |
Target allocation percentages | 60.00% |

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 Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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

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

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

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

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |