Supplemental Financial Information (Tables)

3 Months Ended

Mar. 31, 2020

Supplemental Financial Information

Summary of activity of allowance for doubtful accounts

(in millions)
Allowance for Doubtful Accounts
Balance at December 31, 2019	$	228
Impact of adopting ASU 2016-13		7
Provisions/charges to income		21
Amounts charged off and other deductions		(15)
Balance at March 31, 2020	$	241

Schedule of long-term investments

	March 31,		December 31,
(in millions)	2020		2019
Long-term Investments
Equity securities	$	741	$	836
Other		49		47
Total	$	790	$	883