Total debt at September 30, 2016 and December 31, 2015 consisted of the following:



	Interest rate	September 30, 2016		December 31, 2015
Commercial paper	variable	$	—	$	90,000
Notes due January 2016	4.75%	—		370,914
Notes due September 2017	5.75%	385,109		385,109
Notes due March 2018	5.6%	250,000		250,000
Notes due May 2018	4.75%	350,000		350,000
Notes due March 2019	6.25%	300,000		300,000
Notes due October 2021	3.375%	600,000		—
Notes due March 2024	4.625%	500,000		500,000
Notes due January 2037	5.25%	115,041		115,041
Notes due March 2043	6.7%	425,000		425,000
Term loans	Variable	450,000		150,000
Other debt		5,666		15,758
Principal amount		3,380,816		2,951,822
Less: unamortized debt discount and issuance costs		29,078		23,617
Plus: unamortized interest rate swap proceeds		15,318		22,463
Total debt		3,367,056		2,950,668
Less: current portion long-term debt and notes payable		535,289		461,085
Long-term debt		$	2,831,767	$	2,489,583