Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt [Abstract]

Available and Unused Credit Lines

Available and unused credit lines at December 31, 2018 and 2017 were (in millions):

	2018		2017
Credit Facility	$	2,500.0	$	2,500.0
Uncommitted credit lines	1,231.6		1,181.0
Available and unused credit lines	$	3,731.6	$	3,681.0

Long-Term Debt

Long-term debt at December 31, 2018 and 2017 was (in millions):

	2018			2017
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			1,400.0
	4,900.0			4,900.0
Unamortized premium (discount), net	4.9			6.2
Unamortized debt issuance costs	(16.4		)	(20.3		)
Unamortized deferred gain from settlement of interest rate swaps	48.0			66.4
Fair value adjustment attributed to outstanding interest rate swaps	(52.8		)	(39.4		)
	4,883.7			4,912.9
Current portion	(499.6		)	—
Long-term debt	$	4,384.1		$	4,912.9

Contractual Maturities of Long-Term Debt

The contractual maturities of our long-term debt at December 31, 2018 are (in millions):

2019	$	500.0
2020	1,000.0
2021	—
2022	1,250.0
2023	—
Thereafter	2,150.0
	$	4,900.0

Components of Interest Expense

Interest expense for the three years ended December 31, 2018 is composed of (in millions):

	2018			2017			2016
Long-term debt	$	201.6		$	201.6		$	205.5
Interest rate swaps	5.2			(7.2		)	(13.1		)
Amortization of deferred gain on interest rate swaps	(12.9		)	(12.9		)	(15.4		)
Commercial paper	9.6			12.5			6.8
Fees	5.6			5.6			5.6
Pension and other interest	57.3			49.0			41.9
	$	266.4		$	248.6		$	231.3