Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 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		14		10
Accounts written-off, net of recoveries		(12)		(11)
Acquisitions, divestitures and other, net		(1)		2
Balance as of March 31	$	28	$	30