Commitment and Contingencies (Arbitral Award for the Taking of the Company's Venezuelan Operations) - Additional Information (Detail) - Compensatory Purposes - VENEZUELA - USD ($) $ in Millions		12 Months Ended
	Mar. 13, 2015	Mar. 31, 2016
Commitments and Contingencies Disclosure [Line Items]
Compensation awarded to the subsidiaries		$ 65.7
Compensation awarded to the subsidiaries, annual compound interest rate	4.50%
Portion of compensation awarded to the subsidiaries		37.3
Remaining balance of compensation awarded to the subsidiaries		28.4
Principal Investments
Commitments and Contingencies Disclosure [Line Items]
Compensation awarded to the subsidiaries	$ 46.4
Net Interest Settlements
Commitments and Contingencies Disclosure [Line Items]
Compensation awarded to the subsidiaries		$ 16.8
Legal And Other Settlements
Commitments and Contingencies Disclosure [Line Items]
Compensation awarded to the subsidiaries	$ 2.5