XML 108 R96.htm IDEA: XBRL DOCUMENT
v3.22.4

Employee benefit plans - Weighted-Average Asset Allocations (Details) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 92.00% |
United States |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 100.00% | 100.00%
U.K. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 100.00% | 100.00%
Canada |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 100.00% | 100.00%
Retirement Plans | United States | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 23.40% | 23.50%
Retirement Plans | United States | Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 72.90% | 72.00%
Retirement Plans | United States | Cash and short-term investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 3.70% | 4.50%
Retirement Plans | U.K. | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 22.60% | 32.80%
Retirement Plans | U.K. | Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 76.30% | 66.60%
Retirement Plans | U.K. | Cash and short-term investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 1.10% | 0.60%
Retirement Plans | Canada | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 34.00% | 33.60%
Retirement Plans | Canada | Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 66.00% | 66.40%
Retirement Plans | Canada | Cash and short-term investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 0.00% | 0.00%
Retiree Health and Life Insurance Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 100.00% | 100.00%
Retiree Health and Life Insurance Plans | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 0.00% | 0.00%
Retiree Health and Life Insurance Plans | Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 100.00% | 100.00%
Retiree Health and Life Insurance Plans | Cash and short-term investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total (percent) | 0.00% | 0.00%

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 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 https://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_RetirementPlanSponsorLocationAxis=country_US
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_RetirementPlanSponsorLocationAxis=country_CA
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=us-gaap_DefinedBenefitPlanEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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