Debt (Tables)

12 Months Ended

Dec. 31, 2016

Debt [Abstract]

Available and Unused Credit Lines

Available and unused credit lines at December 31, 2016 and 2015 were (in millions):

	2016		2015
Credit Facility	$	2,500.0	$	2,500.0
Uncommitted credit lines	1,132.0		1,157.7
Available and unused credit lines	$	3,632.0	$	3,657.7

Long-Term Debt

Long-term debt at December 31, 2016 and 2015 was (in millions):

	2016			2015
5.9% Senior Notes due 2016	$	—		$	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
3.60% Senior Notes due 2026	1,400.0			—
Other debt	0.1			0.3
	4,900.1			4,500.3
Unamortized premium (discount), net	7.6			10.1
Unamortized debt issuance costs	(24.2		)	(16.9		)
Unamortized deferred gain from settlement of interest rate swaps	84.7			49.9
Fair value adjustment attributed to interest rate swaps	(47.6		)	22.2
	4,920.6			4,565.6
Current portion	(0.1		)	(1,001.4		)
Long-term debt	$	4,920.5		$	3,564.2

Contractual Maturities of Long-Term Debt

The contractual maturities of our long-term debt at December 31, 2016 are (in millions):

2017	$	0.1
2018	—
2019	500.0
2020	1,000.0
2021	—
Thereafter	3,400.0
	$	4,900.1

Components of Interest Expense

Interest expense for the three years ended December 31, 2016 is composed of (in millions):

	2016			2015			2014
Long-term debt	$	205.5		$	210.2		$	192.7
Interest rate swaps	(13.1		)	(44.1		)	(30.5		)
Amortization of deferred gain on interest rate swaps	(15.4		)	(9.2		)	(7.2		)
Commercial paper	6.8			4.8			2.9
Fees	5.6			5.7			6.2
Other	20.3			13.7			13.1
	$	209.7		$	181.1		$	177.2