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Investments in affiliates and joint ventures - Ownership Percentages (Details)	Dec. 31, 2022
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%

X

- 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

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+ References

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