Goodwill And Intangible Assets (Summary Of Intangible Assets) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	15 years 9 months 18 days
Gross Asset	$ 559.7	$ 568.2
Accumulated Amortization	218.4	214.8
Net	341.3	353.5
Finite-Lived Intangible Assets, Net	341.3	353.5	408.9
Intellectual Property Rights
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	16 years 6 months
Gross Asset	88.6	91.3
Accumulated Amortization	50.2	50.4
Net	38.4	40.9
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	15 years 6 months
Gross Asset	397.8	402.6
Accumulated Amortization	115.9	112.5
Net	281.9	290.1
Drawings
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	37 years 10 months 24 days
Gross Asset	11.1	11.1
Accumulated Amortization	10.1	10.1
Net	1.1	1.1
Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	12 years 10 months 24 days
Gross Asset	62.2	63.2
Accumulated Amortization	42.2	41.8
Net	$ 20.0	$ 21.4