Other Balance Sheet Liabilities (Components Of Other Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Employment costs, Accrued expenses and other liabilities	$ 76.8	$ 112.2
Environmental liabilities, Accrued expenses and other liabilities	10.2	11.5
Accrued taxes, Accrued expenses and other liabilities	4.2	10.3
Pension and other post-employment benefits, Accrued expenses and other liabilities	5.7	5.7
Accrued interest, Accrued expenses and other liabilities	12.1	16.1
Dividends payable, Accrued expenses and other liabilities	10.3	8.8
Unrecognized tax benefits, Accrued expenses and other liabilities	1.5	2.1
Other, Accrued expenses and other liabilities	7.1	6.2
Accrued expenses and other liabilities, Total	127.9	172.9
Employment costs, Other non-current liabilities	21.7	23.4
Environmental liabilities, Other non-current liabilities	109.7	109.6
Accrue taxes, Other non-current liabilities	0.0	0.0
Pension and other post-employment benefits, Other non-current liabilities	0.0	0.0
Accrued interest, Other non-current liabilities	0.0	0.0
Dividends Payable, Noncurrent, Other non-current liabilities	0.0	0.0
Unrecognized tax benefits, Other non-current liabilities	14.2	26.0
Other, Other non-current liabilities	6.9	19.3
Other non-current liabilities, Total	$ 152.5	$ 178.3