Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets attributable to:
Accrued expenses	$ 155.2	$ 49.3
Non-deductible interest	85.9	0.0
Foreign tax credit carryforwards	34.9	0.0
Net operating loss carryforwards	390.7	225.9
Inventories	13.4	0.0
Research and development credit	7.5	0.0
Provisions for pensions and other long-term employee benefits	86.4	56.2
Contingencies related to contracts	111.3	188.3
Other contingencies	33.5	63.1
Fair value losses/gains	12.4	103.1
Other	11.1	15.1
Deferred tax assets	942.3	701.0
Valuation allowance	(430.0)	(172.7)
Deferred tax assets, net of valuation allowance	512.3	528.3
Deferred tax liabilities attributable to:
Revenue in excess of billings on contracts accounted for under the percentage of completion method	41.2	0.0
U.S. tax on foreign subsidiaries’ undistributed earnings not indefinitely reinvested	4.9	0.0
Foreign exchange	21.5	0.0
Property, plant and equipment, intangibles and other assets	403.3	101.1
Margin recognition on construction contracts	6.4	4.1
Deferred tax liabilities	477.3	105.2
Net deferred tax assets	$ 35.0	$ 423.1