Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and Liabilities Measured at Fair Value on a Recurring Basis

	At December 31, 2020								At December 31, 2019
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable securities	$	31	$	31	$	—	$	—	$	63	$	63	$	—	$	—
Derivatives	74		37		37		—		11		1		10		—
Total assets at fair value	$	105	$	68	$	37	$	—	$	74	$	64	$	10	$	—
Derivatives	173		58		115		—		74		26		48		—
Total liabilities at fair value	$	173	$	58	$	115	$	—	$	74	$	26	$	48	$	—

Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

	At December 31										At December 31
									Before-Tax Loss										Before-Tax Loss
	Total		Level 1		Level 2		Level 3		Year 2020		Total		Level 1		Level 2		Level 3		Year 2019
Properties, plant and equipment, net (held and used)	$	2,443	$	—	$	20	$	2,423	$	2,599	$	2,177	$	—	$	—	$	2,177	$	2,095
Properties, plant and equipment, net (held for sale)	1,418		—		1,418		—		193		1,412		—		1,412		—		8,702
Investments and advances	28		—		—		28		2,555		52		—		30		22		594
Total nonrecurring assets at fair value	$	3,889	$	—	$	1,438	$	2,451	$	5,347	$	3,641	$	—	$	1,442	$	2,199	$	11,391