Regulatory Matters, Commitments, Contingencies And Environmental Liabilities (Tables)

6 Months Ended

Jun. 30, 2020

Environmental Exit Costs by Cost [Table Text Block]

The table below reflects the amounts of accrued liabilities recorded in our consolidated balance sheets related to environmental matters that are considered to be probable and reasonably estimable. Currently, we are not able to estimate possible losses or a range of possible losses in excess of amounts accrued. Except for matters discussed above, we do not have any material environmental matters assessed as reasonably possible that require disclosure in our consolidated financial statements.

	June 30, 2020		December 31, 2019
Current	$	43	$	46
Non-current	261		274
Total environmental liabilities	$	304	$	320

Right Of Way [Member]

Lessee, Operating Lease, Disclosure [Table Text Block]

We have certain non-cancelable rights-of-way (“ROW”) commitments, which require fixed payments and either expire upon our chosen abandonment or at various dates in the future. The table below reflects ROW expense included in operating expenses in the accompanying consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
ROW expense	$	10	$	6	$	19	$	12