Income Taxes - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits would affect the effective tax rate	$ 5.9
Additional deferred tax liability	11.0
Deferred taxes not provided for excess of financial reporting over tax basis of investments in foreign subsidiaries	506.6
Income Tax Holiday, Aggregate Dollar Amount	1.8
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.02
Deferred income tax benefit	(309.6)	39.6	260.6
Net operating loss carryforwards in Luxembourg	166.4
Excess income tax benefit from stock-based compensation	8.7	6.4
The tax benefits recognized in the Consolidated Financial Statements from such positions are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement	The tax benefits recognized in the Consolidated Financial Statements from such positions are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement.
Estimated change in unrecognized tax benefits	87.9
Interest (income) expense related to tax matters	2.0	(3.9)
Interest accrued from income tax examinations	17.5	13.6
Continuing Operations [Member]
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits would affect the effective tax rate	53.4
Discontinuing Operations [Member]
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits would affect the effective tax rate	57.6
U.S. Deferred Tax Assets [Member]
Tax Credit Carryforward [Line Items]
Deferred income tax benefit	374.6
Foreign net operating losses [Member]
Tax Credit Carryforward [Line Items]
Decrease in valuation allowance	$ 29.0