Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

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, 2016								At December 31, 2015
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable securities	$	13	$	13	$	—	$	—	$	310	$	310	$	—	$	—
Derivatives	32		15		17		—		205		189		16		—
Total assets at fair value	$	45	$	28	$	17	$	—	$	515	$	499	$	16	$	—
Derivatives	109		78		31		—		53		47		6		—
Total liabilities at fair value	$	109	$	78	$	31	$	—	$	53	$	47	$	6	$	—

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 2016		Total		Level 1		Level 2		Level 3		Year 2015
Properties, plant and equipment, net (held and used)	$	582	$	—	$	15	$	567	$	2,507	$	3,051	$	—	$	239	$	2,812	$	3,222
Properties, plant and equipment, net (held for sale)	891		—		888		3		679		937		—		937		—		844
Investments and advances	26		—		20		6		234		75		—		75		—		28
Total nonrecurring assets at fair value	$	1,499	$	—	$	923	$	576	$	3,420	$	4,063	$	—	$	1,251	$	2,812	$	4,094