Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

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, 2019								At December 31, 2018
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable securities	$	63	$	63	$	—	$	—	$	53	$	53	$	—	$	—
Derivatives	11		1		10		—		283		185		98		—
Total assets at fair value	$	74	$	64	$	10	$	—	$	336	$	238	$	98	$	—
Derivatives	74		26		48		—		12		—		12		—
Total liabilities at fair value	$	74	$	26	$	48	$	—	$	12	$	—	$	12	$	—

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 2019		Total		Level 1		Level 2		Level 3		Year 2018
Properties, plant and equipment, net (held and used)	$	2,177	$	—	$	—	$	2,177	$	2,095	$	102	$	—	$	62	$	40	$	97
Properties, plant and equipment, net (held for sale)	1,412		—		1,412		—		8,702		1,694		—		1,273		421		638
Investments and advances	52		—		30		22		594		81		—		20		61		69
Total nonrecurring assets at fair value	$	3,641	$	—	$	1,442	$	2,199	$	11,391	$	1,877	$	—	$	1,355	$	522	$	804