Accounts and Other Receivables (Components Of Accounts And Other Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current
Trade accounts receivable 1	$ 548.8	$ 526.1
Trade notes receivable	1.7	1.0
Total trade receivables	550.5	527.1
Other notes receivable 1	0.0	0.0
Insurance receivables 2	1.3	43.0
Taxes receivable, including income taxes	12.9	15.0
Other receivables	12.1	14.8
Subtotal other receivables	26.3	72.8
Total trade and other receivables	576.8	599.9
Allowance for doubtful accounts: Current
Trade accounts receivable 1	(5.2)	(4.7)
Trade notes receivable	0.0	(0.1)
Total trade receivables	(5.2)	(4.8)
Other notes receivable 1	0.0	0.0
Total allowance for doubtful accounts	(5.2)	(4.8)
Total receivables, net	571.6	595.1
Long-term
Trade accounts receivable 1	0.0	0.0
Trade accounts receivable 1	1.4	1.2
Total trade receivables	1.4	1.2
Other notes receivable 1	24.2	24.7
Insurance receivables 2	0.0	0.0
Taxes receivable, including income taxes	0.0	0.0
Other receivables	0.0	0.0
Subtotal other receivables	24.2	24.7
Total trade and other receivables	25.6	25.9
Allowance for doubtful accounts: Long-term
Trade accounts receivable 1	0.0	0.0
Trade notes receivable	0.0	(0.1)
Total trade receivables	0.0	(0.1)
Other notes receivable 1	(15.0)	0.0
Total allowance for doubtful accounts	(15.0)	(0.1)
Total net receivables, Long-term	$ 10.6	$ 25.8