6. Borrowings

Borrowings consist of the following:



	June 30, 2012			December 31, 2011
4.875% 10-year notes due October 15, 2015	$	299,342		$	299,244
5.45% 10-year notes due March 15, 2018	348,103			347,938
4.30% 10-year notes due March 1, 2021	449,774			449,761
6.60% 30-year notes due March 15, 2038	247,727			247,683
5.375% 30-year notes due March 1, 2041	345,432			345,352
6.65% 30-year debentures due June 1, 2028	199,431			199,414
5.375% 30-year debentures due October 15, 2035	296,287			296,208
Other	9,056			1,652
Total long-term debt	2,195,152			2,187,252
Less current installments	(3,402		)	(1,022		)
	$	2,191,750		$	2,186,230

The Company maintains a $1 billion unsecured revolving credit facility which expires on November 10, 2016. The Company primarily uses this facility as liquidity back-up for its commercial paper program and has not drawn down any loans under the $1 billion facility and does not anticipate doing so. The Company generally uses commercial paper borrowings for general corporate purposes, funding of acquisitions and the repurchases of its common stock.

Interest expense and interest income for the three and six months ended June 30, 2012 and 2011 were as follows:



	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Interest expense	$	31,478		$	31,080		$	63,123		$	62,116
Interest income	(1,761		)	(2,923		)	(3,379		)	(5,641		)
Interest expense, net	$	29,717		$	28,157		$	59,744		$	56,475