Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Property, plant and equipment	$ 26,432	$ 25,218
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	500,000,000	500,000,000
Common stock, issued (in shares)	309,794,917	309,752,140
Common stock, outstanding (in shares)	309,005,485	309,005,272
Variable Interest Entity, Primary Beneficiary
Property, plant and equipment	$ 1,657		$ 787

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