Other Income (Expense), Net - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Income And Expenses [Abstract]
Impairment of equity method investment	$ 26.0	$ 5.7	$ 2.1	$ 25.8
Impairment of equity method investment, net	18
Other - than - temporary impairment, net per share	$ 0.09
Amount of guarantee obligations given by joint ventures	20
Write-down of investment (expense)	4
Provisions for bad debt on receivables due from joint venture	2
Carrying value of the investment	$ 0