Accounts and Other Receivables (Components Of Accounts And Other Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Receivable, Gross, Current [Abstract]
Trade accounts receivable, Current	$ 457.5	$ 484.0
Trade notes receivable, Current	0.5	1.1
Total trade receivables, Current	458.0	485.1
Note received as partial payment for divestitures, Current	0.0	0.9
Other, Current	0.0	0.0
Income tax receivables, Current	32.6	14.0
Other receivables, Current	38.9	38.0
Subtotal other receivables, Current	71.5	52.9
Total trade and other receivables, Current	529.5	538.0
Allowance for Doubtfull Accounts, Current [Abstract]
Allowance for doubtful accounts, Trade accounts receivable, Current	(9.2)	(14.7)
Allowance for doubtful accounts, Trade note receivable, Current	(0.1)	0.0
Allowance for doubtful accounts, Total trade receivable, Current	(9.3)	(14.7)
Other notes receivable, Current	0.0	0.0
Total allowance for doubtful accounts, Current	(9.3)	(14.7)
Total receivables, net	520.2	523.3
Receivables, Gross, Noncurrent [Abstract]
Trade accounts receivable, Long-term	0.0	0.0
Trade note receivable, Long-term	0.6	2.9
Total trade receivable, Long-term	0.6	2.9
Notes received as partial payment for divestitures, Long-term	0.0	0.0
Other, Long-term	0.4	3.3
Income tax receivables, Long-term	0.0	0.0
Other receivables, Long-term	0.0	0.0
Subtotal other receivables, Long-term	0.4	3.3
Total trade and other receivables, Long-term	1.0	6.2
Allowance for Doubtful Accounts, Noncurrent [Abstract]
Allowance for doubtful accounts, Trade accounts receivable, Long-term	0.0	0.0
Allowance for doubtful accounts, Trade notes receivable, Long-term	(0.2)	(2.1)
Total trade receivable, Long-term	(0.2)	(2.1)
Other notes receivable, Long-term	(0.4)	(0.4)
Total allowance for doubtful accounts, Long-term	(0.6)	(2.5)
Total net receivables, Long-term	$ 0.4	$ 3.7