SUPPLEMENTARY INFORMATION Supplementary Information (Tables)

6 Months Ended

Jun. 30, 2020

Supplemental Cash Flow Elements [Abstract]

Schedule of Pass Through Costs

Pass through costs were as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Pass through costs	$	10	$	12	$	23	$	25