Accounts Receivable, Net of Allowances (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	$ 37.8
Greater than 365 days past due	7.6
Spain
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	12.6
Greater than 365 days past due	0.4
Italy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	13.3
Greater than 365 days past due	1.6
Greece
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	8.9
Greater than 365 days past due	4.6
Portugal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	3.0
Greater than 365 days past due	$ 1.0