Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Line Items]
Amortization expense on identifiable intangible assets	$ 30.7	$ 29.1	$ 25.0
Indefinite lived intangible assets	21.5	43.6
Expected amortization expenses in year one	37
Expected amortization expenses in year two	37
Expected amortization expenses in year three	37
Expected amortization expenses in year four	37
Expected amortization expenses in year five	37
Accumulated goodwill impairment loss	$ 369.3