Debt (Tables)

12 Months Ended

Dec. 31, 2019

Debt [Abstract]

Long-Term Debt

Long-term debt was (in millions):

	December 31,
	2019		2018
6.25% Senior Notes due 2019	$	—	$	500.0
4.45% Senior Notes due 2020	600.0		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
€500 Million 0.80% Senior Notes due 2027	561.4		—
€500 Million 1.40% Senior Notes due 2031	561.4		—
	5,122.8		4,900.0
Unamortized premium (discount), net	0.8		4.9
Unamortized debt issuance costs	(20.0)		(16.4)
Unamortized deferred gain from settlement of interest rate swaps	30.7		48.0
Fair value of interest rate swaps	—		(52.8)
	5,134.3		4,883.7
Current portion	(602.4)		(499.6)
Long-term debt	$	4,531.9	$	4,384.1

Maturities of Long-Term Debt

At December 31, 2019, the maturities of our long-term debt were (in millions):

2020	$	600.0
2021	—
2022	1,250.0
2023	—
2024	750.0
Thereafter	2,522.8
Total principal payments	$	5,122.8

Components of Interest Expense

Interest expense is composed of (in millions):

	Year Ended December 31,
	2019		2018		2017
Long-term debt	$	194.6	$	201.6	$	201.6
Commercial paper	6.5		9.6		12.5
Interest rate swaps	6.1		5.2		(7.2)
Amortization of deferred gain on interest rate swaps	(14.8)		(12.9)		(12.9)
Fees	4.7		5.6		5.6
Pension and other interest	47.2		57.3		49.0
	$	244.3	$	266.4	$	248.6