SUPPLEMENTARY INFORMATION Supplementary Information (Tables)

9 Months Ended

Sep. 30, 2020

Supplemental Cash Flow Elements [Abstract]

Schedule of Pass Through Costs

Pass through costs were as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Pass through costs	$	13	$	12	$	36	$	37