Retirement Benefits (Net Amount Included In Consolidated Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	$ 146.3	$ 240.8
Current liabilities	(4.3)	(3.5)
Noncurrent liabilities	(71.4)	(58.0)
Net amount at December 31	70.6	179.3
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	0
Current liabilities	0	0
Noncurrent liabilities	(298.7)	(257.7)
Net amount at December 31	$ (298.7)	$ (257.7)