Accrued Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Schedule of Accrued Liabilities [Line Items]
Accrued salaries, vacation and related benefits	$ 93.8	$ 75.4
Accrued product warranties	63.2	51.5	38.0	26.6
Accrued interest	28.2	21.7
Income taxes payable	29.5	16.3
Deferred revenue	118.2	113.9
Other accrued liabilities	141.3	101.4
Accrued liabilities	$ 474.2	$ 380.2