Accounts Receivable - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Financing Receivables And Accounts Receivable Sales Arrangements [Line Items]
Sales-type lease and trade receivables	$ 2.8	$ 2.8	$ 2.3
Spain [Member]
Financing Receivables And Accounts Receivable Sales Arrangements [Line Items]
Trade receivables sold without recourse	2.1	4.1	4.3
United States [Member]
Financing Receivables And Accounts Receivable Sales Arrangements [Line Items]
Trade receivable sold with recourse	3.8	6.9	2.1
Sales-type lease [Member]
Financing Receivables And Accounts Receivable Sales Arrangements [Line Items]
Sales-type lease receivables	1.7	1.7	0.9
Trade Receivables with Original Maturities in excess of One Year [Member]
Financing Receivables And Accounts Receivable Sales Arrangements [Line Items]
Trade receivables with original maturities in excess of one year	$ 1.1	$ 1.1	$ 1.4