Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt [Abstract]

Long-term Debt

	December 31,
	2018		2017
Current portion of long-term debt	$	4	$	379
Long-term debt
Debentures, 1.5%, due 2018			$	375
Debentures, 6.625%, due 2019				245
Debentures, 4.25%, due 2020	$	291		288
Debentures, 8.875%, due 2021		65		66
Debentures, 2.90%, due 2022		373		373
Debentures, 3.70%, due 2023		249		249
Medium-term notes, average rate 7.66%, due through 2023		45		45
Debentures, 7.00%, due 2024		100		99
Yen-denominated Debentures, .698%, due 2024		191		185
Yen-denominated Debentures, .722%, due 2025		90
Yen-denominated Debentures, .992%, due 2027		426		414
Yen-denominated Debentures, 1.043%, due 2028		276
Debentures, 6.85%, due 2029		164		166
Yen-Denominated Debentures, 1.219%, due 2030		226
Debentures, callable, 7.25%, due 2036		248		248
Debentures, 4.70%, due 2037		295		248
Yen-denominated Debentures, 1.583%, due 2037		91		85
Debentures, 5.75%, due 2040		395		397
Debentures, 4.75%, due 2042		496		496
Debentures, 5.35%, due 2048		543
Debentures, 4.375%, due 2057		742		743
Debentures, 5.85%, due 2068		296
Other, average rate 5.08%, due through 2043		396		406
Total long-term debt		5,998		5,128
Less current portion of long-term debt		4		379
Long-term debt	$	5,994	$	4,749

Debt Maturities

2019		2020		2021		2022		2023		Thereafter
$	4	$	305	$	68	$	381	$	420	$	4,856