Schedule II

12 Months Ended

Dec. 31, 2018

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

Description (in millions)	Balance at  Beginning of Year		Cumulative effect adjustment for adoption of ASU 2016-13(1)	Credit loss exposure(1)	Write-offs(2)	Balance at End of Year
Year Ended December 31, 2022:
Allowances for credit losses	$	108	n/a	35	(35)	$	109
Year Ended December 31, 2021:
Allowances for credit losses	$	105	n/a	28	(25)	$	108
Year Ended December 31, 2020:
Allowances for uncollectible accounts	$	74	10	49	(27)	$	105

(1) Following the adoption of FASB ASC Topic 326 as of January 1, 2020, we record credit loss reserves to Allowance for credit losses when we establish Trade accounts receivable if credit losses are expected over the asset's contractual life. Subsequent credit loss reserves are recorded when deemed uncollectible. Amounts shown within credit loss exposure above were established through selling, general and administrative expense.

(2) Represents actual write-offs of uncollectible accounts.