Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jan. 20, 2014	Dec. 31, 2013
Discontinued Operations [Abstract]
Cash consideration			$ 550
Results of Operations [Abstract]
Income (loss) from discontinued operations, net of income taxes	(5.6)	1.9
Balance sheet (as of period end) [Abstract]
Assets of discontinued operations	483.0			0
Liabilities of discontinued operations	60.7			0
Reciprocating Compression business [Member]
Results of Operations [Abstract]
Revenues	47.8	56.8
Cost of sales (excluding depreciation and amortization)	37.1	41.1
All other costs	18.0	13.3
Income (loss) before income taxes	(7.3)	2.4
Income tax benefit (provision)	1.7	(0.5)
Income (loss) from discontinued operations, net of income taxes	(5.6)	1.9
Balance sheet (as of period end) [Abstract]
Receivables, net	83.2
Inventories, net	114.9
Other	12.9
Total current assets	211.0
Plant and equipment, net	51.2
Goodwill	213.3
Intangibles, net	1.1
Other assets	6.4
Assets of discontinued operations	483.0
Short-term debt	0.9
Accounts payable and accrued liabilities	58.0
Total current liabilities	58.9
Long-term debt	1.5
Other long-term liabilities	0.3
Liabilities of discontinued operations	$ 60.7