Borrowing Arrangements (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of long-term borrowings

Long-term borrowings, in order of preference, consisted of the following:

		Amount Outstanding
		December 31,
(millions)	Maturity Date	2017		2016
Restated Credit Facility, net of original discount on borrowings and deferred financing costs	February 20, 2020	$	151.0	$	193.4
Other borrowings	Various	2.8		1.7
Total obligations under Restated Credit Facility and other borrowings		153.8		195.1
Less: Current portion of obligations under Restated Credit Facility and other borrowings		20.6		20.4
Total long-term obligations under Restated Credit Facility and other borrowings		$	133.2	$	174.7

Aggregate minimum principal maturities of long-term debt

Aggregate minimum principal maturities of long-term borrowings for the fiscal years following December 31, 2017, are as follows:

(millions)
2018	$	21.6
2019	20.3
2020	113.1
2021	0.3
2022	0.3
Thereafter	—
Total debt	155.6
Less: Current portion, including debt discount	20.6
Less: Original discount on borrowings	0.8
Less: Deferred financing costs	1.0
Total long-term portion, obligations under credit facility and other borrowings	$	133.2