Long-Term Debt and Commercial Paper (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Long-term debt

Long-term debt at December 31 consisted of the following:

Debt Description	Maturity Date	Interest Payable	2018			2017
6.75% Senior Notes	April 15, 2018	April 15 and October 15	$	—		$	400.0
5.5% Senior Notes	February 1, 2020	February 1 and August 1	350.0			350.0
3.35% Senior Notes	January 15, 2021	January 15 and July 15	300.0			300.0
3.5% Senior Notes	November 15, 2024	May 15 and November 15	450.0			450.0
4.5% Senior Notes	October 1, 2025	April 1 and October 1	450.0			450.0
3.8% Senior Notes	November 15, 2027	May 15 and November 15	300.0			300.0
Revolving credit facility	October 19, 2022	Monthly	—			—
Capital leases and other debt	Various dates through 2038	Monthly	133.1			139.4
			1,983.1			2,389.4
Less: unamortized debt discounts and debt issuance costs			(12.6		)	(15.7		)
Less: current maturities			(44.3		)	(414.5		)
Long-term debt, net of current maturities			$	1,926.2		$	1,959.2

Aggregate maturities of non-vehicle long-term debt

At December 31, 2018, aggregate maturities of non-vehicle long-term debt were as follows:

Year Ending December 31:
2019	$	44.3
2020	354.8
2021	304.7
2022	4.6
2023	4.8
Thereafter	1,269.9
	$	1,983.1