Earnings per share (Tables)

12 Months Ended

Dec. 31, 2019

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Summary of Earnings per Share

	2019		2018		2017
	million		million		million
Issued ordinary shares at January 1		12,267		10,088		9,818
Effect of issuance of A shares		—		450		—
Effect of issuance of H shares		—		181		106
Weighted average number of ordinary shares at December 31		12,267		10,719		9,924