Accounts and Other Receivables (Allowance For Doubtful Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	$ 17.2	$ 17.6
Charges	(2.6)	(4.9)	$ (6.1)
Charge-offs, net of recoveries	9.9	5.3
Ending Balance	9.9	17.2	17.6
Total trade receivables
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	16.8	16.5
Charges	(2.6)	(4.9)
Charge-offs, net of recoveries	9.9	4.6
Ending Balance	9.5	16.8	16.5
Trade accounts receivable
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	14.7	14.6
Charges	(2.3)	(4.7)
Charge-offs, net of recoveries	7.8	4.6
Ending Balance	9.2	14.7	14.6
Trade notes receivable
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	2.1	1.9
Charges	(0.3)	(0.2)
Charge-offs, net of recoveries	2.1	0.0
Ending Balance	0.3	2.1	1.9
Other notes receivable
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	0.4	1.1
Charges	0.0	0.0
Charge-offs, net of recoveries	0.0	0.7
Ending Balance	$ 0.4	$ 0.4	$ 1.1