Borrowings (Tables)

6 Months Ended

Jun. 30, 2013

Debt Disclosure [Abstract]

Schedule of Short-term Debt [Table Text Block]

Borrowings consist of the following:

	June 30, 2013		December 31, 2012
Short-term
Current portion of long-term debt	$	3,581	$	3,266
Commercial paper	662,200		607,500
	$	665,781	$	610,766

Schedule of Long-term Debt Instruments [Table Text Block]

	June 30, 2013			December 31, 2012
Long-term
4.875% 10-year notes due October 15, 2015	$	299,540		$	299,441
5.45% 10-year notes due March 15, 2018	348,433			348,268
4.30% 10-year notes due March 1, 2021	449,800			449,787
6.60% 30-year notes due March 15, 2038	247,815			247,771
5.375% 30-year notes due March 1, 2041	345,591			345,511
6.65% 30-year debentures due June 1, 2028	199,466			199,448
5.375% 30-year debentures due October 15, 2035	296,446			296,367
Other	6,301			6,023
Total long-term debt	2,193,392			2,192,616
Less current installments	(3,581		)	(3,266		)
	$	2,189,811		$	2,189,350

Schedule of Interest expense and interest income [Table Text Block]

Interest expense and interest income for the three and six months ended June 30, 2013 and 2012 were as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Interest expense	$	31,041		$	31,473		$	61,913		$	63,111
Interest income	(761		)	(1,758		)	(1,389		)	(3,365		)
Interest expense, net	$	30,280		$	29,715		$	60,524		$	59,746