Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 29, 2014
Operating Loss Carryforwards
Tax credit carryforwards	$ 16.9	$ 16.9
Carryforwards expiring in 2015	3.9	3.9
Tax credit carryforwards expiring between 2015 and 2034	426.6	426.6
Impairment charges		38.1	6.7	285.9
Increase (decrease) in valuation allowance		3.6	21.2
Income taxes	29.7	214.1	60.3	(14.2)
Foreign withholding taxes on foreign dividends		18.6
Undistributed foreign earnings	1,265.0	1,265.0
Foreign earnings from the service solution sale to be repatriated in future		278.0
Foreign earnings portion related to withholding taxes from the service solution sale to be repatriated in future				100.8
Unrecognized Tax Benefits	63.3	63.3	128.4	108.4
Net unrecognized tax benefits	33.9	33.9	72.9	72.5
Portion of unrecognized benefits which, if recognized, would impact future effective tax rates	33.3	33.3
Gross accrued interest	5.9	5.9	12.4	12.8
Net accrued interest	4.9	4.9	8.6	8.6
Gross interest income included in income tax (provision) benefit		0.9	0.2	2.9
Penalties excluded	0	0	7.1	7.1
Penalties recorded		(7.1)	0	1.5
Reasonably possible amount that unrecognized tax benefits could decrease within next 12 months, low end of range	10.0	10.0
Reasonably possible amount that unrecognized tax benefits could decrease within next 12 months, high end of range	15.0	15.0
Valuation Allowance on Foreign Deferred Tax Assets	5.1	5.1
Aggregate changes in balance of unrecognized tax benefits
Unrecognized tax benefit - opening balance		128.4	108.4	120.4	128.4
Gross increases - tax positions in prior period		3.7	0.5	20.6
Gross decreases - tax positions in prior period		(36.9)	(2.3)	(33.9)
Gross increases - tax positions in current period		11.7	28.4	11.2
Settlements		(28.2)	(1.1)	(7.1)
Lapse of statute of limitations		(14.7)	(5.5)	(2.7)
Change due to foreign currency exchange rates		(0.7)		(0.1)
Unrecognized tax benefit - ending balance	63.3	63.3	128.4	108.4
Uncertain Tax Positions and Other Tax Matters
Tax charges related to valuation allowances recorded against foreign deferred income tax assets		19.6
Tax charges on spin-off transactions		5.1
Income taxes relating to repatriation of earnings	18.6	18.6
Foreign income taxes relating to spin-off	6.0	6.0
Income tax charges related to valuation allowances recorded against foreign deferred income tax assets			(9.5)	5.4
Tax benefit related to audit settlements and statute expirations		28.6	6.5	22.3
Tax benefit related to loss on an investment in a foreign subsidiary		6.4
Tax benefit related to the research and experimentation credit generated in 2012			4.1
Income tax charges related foreign dividends and undistributed earnings that are no longer considered to be indefinitely reinvested				15.4
Tax expense partially offset with the deconsolidation of dry cooling business in China				6.1
Maximum period for which impact on state income tax returns of any federal changes remains subject to examination by various states		1 year
Continuing operations
Operating Loss Carryforwards
Income taxes		36.5
Discontinued operations
Operating Loss Carryforwards
Income taxes			(0.5)
Foreign earnings portion related to withholding taxes from the service solution sale to be repatriated in future				91.8
Cooling
Operating Loss Carryforwards
Income tax benefit associated with the impairment charges related to cooling				26.3
Impairment charges				281.4
EGS Electrical Group, LLC and Subsidiaries ("EGS")
Uncertain Tax Positions and Other Tax Matters
Gain on sale of interest in EGS		491.2			491.2
State and Local Jurisdiction
Operating Loss Carryforwards
Tax loss carryforwards	362.0	362.0
Foreign Jurisdictions
Operating Loss Carryforwards
Tax loss carryforwards	$ 874.8	$ 874.8
Minimum
Operating Loss Carryforwards
State income tax returns subject to examination for a period		3 years
Maximum
Operating Loss Carryforwards
State income tax returns subject to examination for a period		5 years