Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	9 Months Ended	0 Months Ended					60 Months Ended	108 Months Ended
	Dec. 24, 2014 plaintiff	Dec. 31, 2014 site	Nov. 21, 2014	Nov. 09, 2014	Nov. 06, 2014	Oct. 31, 2014	Nov. 01, 2015	Dec. 31, 2019	Dec. 31, 2024	Mar. 31, 2014
Loss Contingencies [Line Items]
Number of plaintiffs	400
Number of federally defined Superfund sites		50
Intended to disclose environmental remediation cost liability		$ 22.8								$ 25.5
Expected cost for remediation, Minimum to Tampa, Florida		10.0
Expected cost for remediation, Maximum to Tampa, Florida		14.0
Costs for supplemental investigations, remediation and site closure, Minimum to Columbus, Georgia		6.0
Costs for supplemental investigations, remediation and site closure, Maximum to Columbus, Georgia		8.5
Outstanding letters of credit, face value		0.8
Surety bonds, face value		47.8
Bank guarantees outstanding		9.8
Damage from Hazard
Loss Contingencies [Line Items]
Number of lawsuits filed	6
Damage from Hazard | SCAQMD | Minimum
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value		40.0
Damage from Hazard | SCAQMD | Maximum
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value		60.0
Damage from Hazard | TCEQ
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value		0.1
Damage from Hazard | EPA
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value		0.1
Negligence, negligence per se, private /public permanent/continuing nuisance causing special injury, private and public trespass, violation of California’s unfair trade practices act, misrepresentation and fraudulent concealment, and absolute liability for ultra-hazardous activity
Loss Contingencies [Line Items]
Number of lawsuits filed	5
Wrongful Death, Survival Actions, and Loss of Consortium
Loss Contingencies [Line Items]
Number of lawsuits filed	1
Hazardous Waste, Possible Closure of Recycling Facility, Vernon California | Pending Litigation | DTSC
Loss Contingencies [Line Items]
Amount committed					38.7
Amount Offset by Bond					11.1
Amount paid			3.0			0.5
Total installments					24.8
Period of repayment						10 years
Site Contingency, Maximum Period of Annual Payments to Corrective Actions Remediation Trust Fund						10 years
Site Contingency, Settlement Payment Due Within Three Days of Stipulation and Order Becoming Effective				1.3
Site Contingency, First Installment Payment Amount			2.3
Site Contingency, Implementation Period for Potential Industrial Corrective Measures						5 years
Hazardous Waste, Possible Closure of Recycling Facility, Vernon California | Pending Litigation | Bankruptcy Case - DTSC Prepetition Oversight Costs
Loss Contingencies [Line Items]
Bankruptcy claims					0.1
Hazardous Waste, Possible Closure of Recycling Facility, Vernon California | Pending Litigation | Bankruptcy Case - California Environmental Quality Act Compliance Costs
Loss Contingencies [Line Items]
Bankruptcy claims					0.6
Scenario, Forecast | Hazardous Waste, Possible Closure of Recycling Facility, Vernon California | Pending Litigation | DTSC
Loss Contingencies [Line Items]
Amount paid							2.8
Annual payment									2.1
Maximum amount to be paid								$ 9.0
Site Contingency, Period of Remediation Actions								5 years