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Supplemental Financial Information (Other Assets, Net) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Deferred costs	$ 86.9	$ 82.3
Intangible assets	31.7	49.0
Deferred tax assets	36.8	38.4
Supplemental executive retirement plan assets	44.8	43.2
Prepaid taxes on intercompany transfers of property	38.4	39.7
Warranty and other claim receivables	0.0	30.6
Unbilled receivables	1.7	18.6
Other	11.2	12.4
Other Assets, Net	$ 251.5	$ 314.2

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Amount due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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