Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets attributable to
Accrued expenses	$ 124.4	$ 128.0
Capital Loss	21.1	21.2
Non-deductible interest	84.7	89.3
Foreign tax credit carryforwards	135.3	105.9
Deferred Tax Assets, Tax Credit Carryforwards, Other	113.2	0.0
Net operating loss carryforwards	430.5	382.8
Inventories	6.3	3.2
Research and development credit	7.6	6.5
Foreign exchange	20.4	32.5
Provisions for pensions and other long-term employee benefits	84.1	72.4
Contingencies related to contracts	89.9	83.7
Other contingencies	73.4	28.7
Margin recognition on construction contracts	115.9	34.4
Deferred tax assets, leasing	219.8	0.0
Deferred Tax Assets, Revenue In Excess Of Billings On Contracts Accounted For Under The Percentage Of Completion Method	10.9	0.0
Other	6.9	15.2
Deferred tax assets	1,544.4	1,003.8
Deferred Tax Assets, Valuation Allowance	916.9	683.4
Deferred tax assets, net of valuation allowance	627.5	320.4
Deferred tax liabilities attributable to
Revenue in excess of billings on contracts accounted for under the percentage of completion method		9.2
U.S. tax on foreign subsidiaries’ undistributed earnings not indefinitely reinvested	10.4	9.4
Property, plant and equipment, intangibles and other assets	279.6	278.6
Deferred tax liabilities, leasing	215.2	0.0
Deferred tax liabilities	505.2	297.2
Net deferred tax assets/(liabilities)	$ 122.3	$ 23.2