Organization and Significant Accounting Policies, Research, Development and Patent Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Research, Development and Patent Expenses [Abstract]
Research and development expenses	$ 372.5	$ 340.4	$ 319.5
Patents [Member]
Patents [Abstract]
Estimated useful life	10 years 1 month 6 days
Cost	$ 30.8	28.8
Accumulated amortization	8.8	8.4
Estimated Amortization Expense [Abstract]
2018	1.6
2019	1.4
2020	1.3
2021	1.3
2022	1.2
Patent expenses	2.1	3.9	2.8
Non-cash charges related to write-down	0.4	2.3	1.1
Collaborative Agreements [Member]
Research, Development and Patent Expenses [Abstract]
Research and development expenses	$ 59.5	$ 187.1	$ 161.7