Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2020

Basis of Presentation

Summary of allowance for doubtful accounts

	2020		2019
Balance as of January 1,	$	28	$	29
Adoption of new accounting standard		(1)		—
Additions charged to expense		40		27
Accounts written-off, net of recoveries		(29)		(31)
Acquisitions, divestitures and other, net		(4)		2
Balance as of September 30,	$	34	$	27