Business Segments Business Segment Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Assets	$ 527.9	$ 563.7	$ 761.8
Capital Expenditures	13.8	17.7	9.2
Total Depreciation and Amortization	36.4	40.5	40.4
Compressor products [Member]
Segment Reporting Information [Line Items]
Assets	392.3	452.1	662.6
Capital Expenditures	11.9	11.5	6.8
Total Depreciation and Amortization	29.0	32.6	33.4
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets	133.5	111.1	98.7
Capital Expenditures	1.9	6.2	2.4
Total Depreciation and Amortization	7.4	7.9	7.0
Assets Held-for-sale [Member]
Segment Reporting Information [Line Items]
Assets	$ 2.1	$ 0.5	$ 0.5