SHORT AND LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Long-term debt consisted of the following:

December 31,	2017			2016
1.60% Notes due 2018	$	300,000		$	300,000
4.125% Notes due 2020	350,000			350,000
8.8% Debentures due 2021	84,715			84,715
2.625% Notes due 2023	250,000			250,000
3.20% Notes due 2025	300,000			300,000
2.30% Notes due 2026	500,000			500,000
7.2% Debentures due 2027	193,639			193,639
3.375% Notes due 2046	300,000			300,000
Capital lease obligations	99,194			83,619
Net impact of interest rate swaps, debt issuance costs and unamortized debt discounts	(16,427		)	(14,275		)
Total long-term debt	2,361,121			2,347,698
Less—current portion	300,098			243
Long-term portion	$	2,061,023		$	2,347,455

Schedule of Maturities of Long-term Debt

Aggregate annual maturities of our long-term Notes (excluding capital lease obligations and net impact of interest rate swaps, debt issuance costs and unamortized debt discounts) are as follows for the years ending December 31:

2018	$	300,098
2019	—
2020	350,000
2021	84,715
2022	—
Thereafter	1,543,639

Schedule of Net Interest Expense

Net interest expense consists of the following:

For the years ended December 31,	2017			2016			2015
Interest expense	$	104,232		$	97,851		$	93,520
Capitalized interest	(4,166		)	(5,903		)	(12,537		)
Loss on extinguishment of debt	—			—			28,326
Interest expense	100,066			91,948			109,309
Interest income	(1,784		)	(1,805		)	(3,536		)
Interest expense, net	$	98,282		$	90,143		$	105,773