Fair Value (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Carrying And Fair Values Of Other Financial Assets And Liabilities

The following tables present the fair values of

our other financial assets and liabilities on December 31, 2020 and 2019, and the basis for determining their fair values:

	Carrying Value		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial Assets (Liabilities)	December 31, 2020
Measured at fair value:
Marketable securities held in trust:
Cash and equivalents	$	19	$	19	$	17	$	2	$	—
Available-for-sale debt securities	134		134		—		134		—
Equity securities	58		58		58		—		—
Other investments	9		9		—		—		9
Cash flow hedges	419		419		—		419		—
Measured at amortized cost:
Short- and long-term debt principal	(13,117)		(14,606)		—		(14,606)		—
	December 31, 2019
Measured at fair value:
Marketable securities held in trust:
Cash and equivalents	$	24	$	24	$	11	$	13	$	—
Available-for-sale debt securities	129		129		—		129		—
Equity securities	54		54		54		—		—
Other investments	4		4		—		—		4
Cash flow hedges	26		26		—		26		—
Measured at amortized cost:
Short- and long-term debt principal	(12,005)		(12,339)		—		(12,339)		—