Other Balance Sheet Liabilities (Components Of Other Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Employment costs	$ 112.2	$ 128.7
Environmental liabilities	11.5	12.0
Accrued taxes	10.3	34.7
Pension and other post-employment benefits	5.7	5.7
Accrued interest	16.1	16.2
Dividends payable	8.8	7.6
Unrecognized tax benefits	2.1	0.1
Other	6.8	4.3
Accrued expenses and other liabilities, Total	173.5	209.3
Employment costs	23.4	19.1
Environmental liabilities	109.6	113.9
Accrue taxes	0	0
Pension and other post-employment benefits	0	0
Accrued interest	0	0
Unrecognized tax benefits	26.0	18.1
Other	19.3	18.3
Other non-current liabilities, Total	$ 178.3	$ 169.4