Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Estimated Fair Values and Carrying Amounts of Assets and Liabilities

	Level in Fair Value Hierarchy	March 31, 2020				December 31, 2019
		Carrying  Amount		Fair Value		Carrying  Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	310	$	310	$	196	$	196
Restricted cash, current and non-current	1	162		162		142		142
Liabilities:
Total debt and other obligations	2	18,695		19,175		18,121		19,170