Allowance for Doubtful Account (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at December 31, 2012	$ 20.6
2013 Charges	4.3	4.3
2013 Charge- offs, net of recoveries	5.6
Balance at September 30, 2013	19.3
Total trade receivables
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at December 31, 2012	19.7
2013 Charges	4.3
2013 Charge- offs, net of recoveries	5.5
Balance at September 30, 2013	18.5
Trade accounts receivable
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at December 31, 2012	18.9
2013 Charges	4.0
2013 Charge- offs, net of recoveries	6.3
Balance at September 30, 2013	16.6
Trade notes receivable
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at December 31, 2012	0.8
2013 Charges	0.3
2013 Charge- offs, net of recoveries	(0.8)
Balance at September 30, 2013	1.9
Other
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at December 31, 2012	0.9
2013 Charges	0
2013 Charge- offs, net of recoveries	0.1
Balance at September 30, 2013	$ 0.8