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Group income statement (Parenthetical) - USD ($) shares in Millions, $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Earnings per share [line items] |  |
Borrowing costs capitalised | $ 174 | $ 175
PLC And Limited |  |
Earnings per share [line items] |  |
Weighted average number of ordinary shares outstanding (in shares) | 1,618.1 | 1,617.3
Rio Tinto Plc |  |
Earnings per share [line items] |  |
Weighted average number of ordinary shares outstanding (in shares) | 1,246.9 | 1,246.5
Rio Tinto Limited |  |
Earnings per share [line items] |  |
Weighted average number of ordinary shares outstanding (in shares) | 371.2 | 370.8

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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 23 -IssueDate 2020-01-01 -Paragraph 26 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=23&code=ifrs-tx-2020-en-r&anchor=para_26_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2020-01-01 -Paragraph 70 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_70_b&doctype=Standard -URIDate 2020-01-01 + Details
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