Note 7 - Pension, Post-Retirement and Post-Employment Plans (Details) - Changes in Company's Post-retirement Medical Benefit Obligations (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Oct. 31, 2013	Dec. 31, 2012
Successor [Member] | Domestic Postretirement Benefit Plan of Foreign Entity [Member]
Change in Accumulated Postretirement Benefit:
Balance		$ 6.8
Acquisitions	6.7
Service cost		0.1
Interest cost	0.1	0.3
Actuarial loss/(gain) due to assumption change	0.1	0.5
Benefits and expenses paid	(0.1)	(0.3)
Balance	6.8	7.4
Successor [Member] | Foreign Postretirement Benefit Plan [Member]
Change in Accumulated Postretirement Benefit:
Acquisitions	0.3
Balance	0.3	0.3
Predecessor [Member] | Domestic Postretirement Benefit Plan of Foreign Entity [Member]
Change in Accumulated Postretirement Benefit:
Balance			6.9	6.0
Service cost			0.1	0.1
Interest cost	0.1		0.2	0.3
Employee contributions			0.2	0.3
Actuarial loss/(gain) due to assumption change			(0.1)	0.6
Actuarial loss/(gain) due to plan experience			(0.1)	0.2
Benefits and expenses paid			(0.5)	(0.6)
Balance			6.6	6.9
Predecessor [Member] | Foreign Postretirement Benefit Plan [Member]
Change in Accumulated Postretirement Benefit:
Balance			0.4
Actuarial loss/(gain) due to assumption change			(0.1)
Other				0.4
Balance			$ 0.3	$ 0.4