Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt [Abstract]

Available and Unused Lines of Credit

Available and unused credit lines at December 31, 2015 and 2014 were (in millions):

	2015		2014
Credit Facility	$	2,500.0	$	2,500.0
Uncommitted credit lines	1,157.7		937.8
Available and unused credit lines	$	3,657.7	$	3,437.8

Long-Term Debt

Long-term debt at December 31, 2015 and 2014 was (in millions):

	2015			2014
5.9% Senior Notes due 2016	$	1,000.0		$	1,000.0
6.25% Senior Notes due 2019	500.0			500.0
4.45% Senior Notes due 2020	1,000.0			1,000.0
3.625% Senior Notes due 2022	1,250.0			1,250.0
3.65% Senior Notes due 2024	750.0			750.0
Other debt	0.3			0.5
	4,500.3			4,500.5
Unamortized premium (discount) on senior notes, net	10.1			11.1
Debt issuance costs	(16.9		)	(20.5		)
Adjustment to carrying value for interest rate swaps	72.1			51.4
	4,565.6			4,542.5
Current portion	(1,001.4		)	(0.4		)
Long-term debt	$	3,564.2		$	4,542.1

Components of Interest Expense

Interest expense for the three years ended December 31, 2015 is composed of (in millions):

	2015			2014			2013
Long-term debt	$	210.2		$	192.7		$	182.0
Interest rate swaps	(53.3		)	(37.7		)	(7.3		)
Commercial paper	4.8			2.9			1.7
Fees	5.7			6.2			6.5
Other	13.7			13.1			14.3
	$	181.1		$	177.2		$	197.2

Contractual Maturities of Long-Term Debt

The contractual maturities of our long-term debt at December 31, 2015 are (in millions):

2016	$	1,000.3
2017	—
2018	—
2019	500.0
2020	1,000.0
Thereafter	2,000.0
	$	4,500.3