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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.

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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 https://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 https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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- 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

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Retirement benefits - Asset Allocation Target and Actual Percentage (Details)	Dec. 31, 2022	Dec. 31, 2021
U.S. equity securities \| Minimum
Asset category, Target
Target	60.00%
U.S. equity securities \| Maximum
Asset category, Target
Target	80.00%
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
Asset category, Target
Target	100.00%
Pension benefits \| U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	58.00%	59.00%
Asset category, Target
Target	50.00%
Pension benefits \| U.S. equity securities \| Minimum
Asset category, Target
Target	40.00%
Pension benefits \| U.S. equity securities \| Maximum
Asset category, Target
Target	65.00%
Pension benefits \| Non-U.S equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	13.00%	13.00%
Asset category, Target
Target	15.00%
Pension benefits \| Non-U.S equity securities \| Minimum
Asset category, Target
Target	5.00%
Pension benefits \| Non-U.S equity securities \| Maximum
Asset category, Target
Target	25.00%
Pension benefits \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	27.00%	27.00%
Asset category, Target
Target	30.00%
Pension benefits \| Fixed income securities \| Minimum
Asset category, Target
Target	20.00%
Pension benefits \| Fixed income securities \| Maximum
Asset category, Target
Target	60.00%
Pension benefits \| Private equity
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	2.00%	1.00%
Asset category, Target
Target	5.00%
Pension benefits \| Private equity \| Minimum
Asset category, Target
Target	0.00%
Pension benefits \| Private equity \| Maximum
Asset category, Target
Target	10.00%
Other benefits
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
Asset category, Target
Target	100.00%
Other benefits \| U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	57.00%	58.00%
Asset category, Target
Target	50.00%
Other benefits \| U.S. equity securities \| Minimum
Asset category, Target
Target	40.00%
Other benefits \| U.S. equity securities \| Maximum
Asset category, Target
Target	65.00%
Other benefits \| Non-U.S equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	15.00%	15.00%
Asset category, Target
Target	15.00%
Other benefits \| Non-U.S equity securities \| Minimum
Asset category, Target
Target	5.00%
Other benefits \| Non-U.S equity securities \| Maximum
Asset category, Target
Target	25.00%
Other benefits \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	28.00%	27.00%
Asset category, Target
Target	30.00%
Other benefits \| Fixed income securities \| Minimum
Asset category, Target
Target	20.00%
Other benefits \| Fixed income securities \| Maximum
Asset category, Target
Target	60.00%
Other benefits \| Private equity
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	0.00%	0.00%
Asset category, Target
Target	5.00%
Other benefits \| Private equity \| Minimum
Asset category, Target
Target	0.00%
Other benefits \| Private equity \| Maximum
Asset category, Target
Target	10.00%