Severance And Facility Exiting Liabilities (Summary Of Liabilities (Pre-Tax) Related To Closing Facilities And Employee Severance) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) facility employee	Dec. 31, 2016 USD ($) facility employee	Dec. 31, 2015 USD ($) facility employee
Liability
Beginning balance	$ 18.3	$ 56.0
Additions and adjustments	46.4	28.0
Utilization	(21.4)	(65.7)
Ending balance	43.3	18.3	$ 56.0
Number of Facilities
Provisions for severance	$ 53.0	$ 36.2	$ 58.3
Severance
Number of Employees
Beginning balance | employee	35	53
Additions and adjustments | employee	718	165
Utilization | employee	(215)	(183)
Ending balance | employee	538	35	53
Liability
Beginning balance	$ 3.2	$ 36.9
Additions and adjustments	41.5	28.6
Utilization	(16.4)	(62.3)
Ending balance	28.3	3.2	$ 36.9
Facilities
Liability
Beginning balance	15.1	19.1
Additions and adjustments	4.9	(0.6)
Utilization	(5.0)	(3.4)
Ending balance	$ 15.0	$ 15.1	$ 19.1
Number of Facilities
Beginning balance | facility	11	8
Additions and adjustments | facility	3	5
Utilization | facility	(4)	(2)
Ending balance | facility	10	11	8