Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Consolidated Balance Sheet
Allowances for doubtful accounts receivable	$ 161	$ 95
Common stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	944,033,056	944,033,056
Common stock, Shares outstanding (in shares)	575,184,835	576,575,168

Amount of allowance for credit loss on accounts receivable, classified as current.

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