Short-Term Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Short-Term Debt

	At December 31
	2015			2014
Commercial paper*	$	8,252		$	8,506
Notes payable to banks and others with originating terms of one year or less	20			104
Current maturities of long-term debt	1,487			—
Current maturities of long-term capital leases	17			22
Redeemable long-term obligations
Long-term debt	3,152			3,152
Capital leases	—			6
Subtotal	12,928			11,790
Reclassified to long-term debt	(8,000		)	(8,000		)
Total short-term debt	$	4,928		$	3,790

^*  Weighted-average interest rates at December 31, 2015 and 2014, were 0.26 percent and 0.12 percent, respectively.