The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
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-Subparagraph e
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EQUITY ACCOUNTED INVESTMENTS - Schedule Of Fair Value Of Equity Accounted Investments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Associates And Joint Ventures [Line Items]
Equity accounted investments	$ 41,327	$ 40,698	$ 33,647
Norbord
Disclosure Of Associates And Joint Ventures [Line Items]
Public Price	0	900
Publicly traded equity accounted investment [Member] \| Norbord
Disclosure Of Associates And Joint Ventures [Line Items]
Public Price	$ 0	$ 1,200