Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2007 Country
Commitments And Contingencies Disclosure [Line Items]
Number of countries in which business were sold			18
Other long-term liabilities	$ 1,526.2	$ 1,612.6
Accrued payroll and other liabilities	1,374.8	1,362.8
Indemnification Agreement
Commitments And Contingencies Disclosure [Line Items]
Other long-term liabilities	42.0	49.4
Accrued payroll and other liabilities	$ 0	$ 21.2