Construction in Progress (Tables)

12 Months Ended

Dec. 31, 2020

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Summary of Construction in Progress

	2020			2019
	Million			Million
As of January 1		67,978			72,180
Additions		176,422			163,312
Transferred to property, plant and equipment		(172,749	)		(167,514	)
As of December 31		71,651			67,978