Short-Term Debt (Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

Short-Term Debt

	At December 31
	2012			2011
Commercial paper*	$	2,783		$	2,498
Notes payable to banks and others with originating terms of one year or less	23			40
Current maturities of long-term debt	20			17
Current maturities of long-term capital leases	38			54
Redeemable long-term obligations
Long-term debt	3,151			3,317
Capital leases	12			14
Subtotal	6,027			5,940
Reclassified to long-term debt	(5,900		)	(5,600		)
Total short-term debt	$	127		$	340

* Weighted-average interest rates at December 31, 2012 and 2011, were 0.13 percent and 0.04 percent, respectively.