Goodwill And Intangible Assets (Components Of Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	$ 1,820.7	$ 419.6
Intangible assets, accumulated amortization	486.9	245.9
Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	240.0	0.0
Intangible assets, accumulated amortization	25.0	0.0
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	175.0	0.0
Intangible assets, accumulated amortization	118.0	0.0
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	285.0	0.0
Intangible assets, accumulated amortization	29.0	0.0
Licenses, patents and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	810.1	167.3
Intangible assets, accumulated amortization	157.7	120.9
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	237.9	154.7
Intangible assets, accumulated amortization	145.5	107.4
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	72.7	97.6
Intangible assets, accumulated amortization	$ 11.7	$ 17.6