Earnings per Share - Schedule of Earnings per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings per share [abstract]
Income/(loss) attributable to Royal Dutch Shell plc shareholders	$ (18,131)	$ (24)	$ 2,998	$ (18,155)	$ 8,999
Weighted average number of shares used as the basis for determining:
Basic earnings per share (in shares)	7,789.8	7,819.8	8,100.8	7,804.8	8,126.3
Diluted earnings per share (in shares)	7,789.8	7,819.8	8,153.7	7,804.8	8,182.1

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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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.

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