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Investments in affiliates and joint ventures - Ownership Percentages (Details) | Dec. 31, 2022
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Nuna Logistics Ltd. |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 49.00%
North American Nuna Joint Venture |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 50.00%
Nuna East Ltd. |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 37.00%
Nuna Pang Contracting Ltd. |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 37.00%
Nuna West Mining Ltd. |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 49.00%
Mikisew North American Limited Partnership ("MNALP") |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 49.00%
ASN Constructors ("ASN") |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 30.00%
Red River Valley Alliance LLC ("RRVA") |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 15.00%
NAYL Realty Inc. |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 49.00%
BNA Remanufacturing Limited Partnership |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 50.00%
Dene North Site Services Partnership |
Variable Interest Entity [Line Items] |
NL Partnership Interest in equity method investments | 49.00%

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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