Accounting Policies (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Intangible assets
Non-cash pre-tax impairment charges of indefinite lived intangible assets	$ 1.3	$ 0.7	$ 0.4
Intangible assets subject to amortization
Gross Carrying Amount	295.1	199.0
Accumulated Amortization	(123.6)	(108.5)
Net Carrying Amount	171.5	90.5
Indefinite-lived intangible assets
Indefinite-lived intangible assets	38.6	41.9
Intangible assets
Gross Carrying Amount	333.7	240.9
Net Carrying Amount	210.1	132.4
Weighted-average amortization	12 years 2 months 12 days
Aggregate amortization expense for amortized intangible assets	15.2	14.7	15.4
Future amortization expense
Future amortization expense, 2015	20.5
Future amortization expense, 2016	20.1
Future amortization expense, 2017	19.7
Future amortization expense, 2018	16.2
Future amortization expense, 2019	14.0
Aerco
Intangible assets
Net Carrying Amount	102.4
Weighted-average amortization	15 years
Patents
Intangible assets subject to amortization
Gross Carrying Amount	16.2	16.6
Accumulated Amortization	(13.3)	(12.6)
Net Carrying Amount	2.9	4.0
Intangible assets
Weighted-average amortization	5 years
Customer relationships
Intangible assets subject to amortization
Gross Carrying Amount	206.7	133.0
Accumulated Amortization	(87.5)	(76.4)
Net Carrying Amount	119.2	56.6
Intangible assets
Weighted-average amortization	11 years 10 months 24 days
Customer relationships | Aerco
Intangible assets
Gross Carrying Amount	78.5
Weighted-average amortization	16 years
Technology
Intangible assets subject to amortization
Gross Carrying Amount	42.1	26.9
Accumulated Amortization	(12.9)	(10.9)
Net Carrying Amount	29.2	16.0
Intangible assets
Weighted-average amortization	10 years 3 months 18 days
Technology | Aerco
Intangible assets
Gross Carrying Amount	15.8
Weighted-average amortization	10 years
Trade name
Intangible assets subject to amortization
Gross Carrying Amount	20.6	13.7
Accumulated Amortization	(4.2)	(3.0)
Net Carrying Amount	16.4	10.7
Intangible assets
Weighted-average amortization	14 years 6 months
Trade name | Aerco
Intangible assets
Gross Carrying Amount	7.4
Weighted-average amortization	20 years
Trade name | Americas
Intangible assets
Long-lived assets written-down	0.5
Trade name | EMEA
Intangible assets
Long-lived assets written-down	0.8
Other
Intangible assets subject to amortization
Gross Carrying Amount	9.5	8.8
Accumulated Amortization	(5.7)	(5.6)
Net Carrying Amount	$ 3.8	$ 3.2
Intangible assets
Weighted-average amortization	33 years 3 months 18 days