Other Assets, Net - Other Assets, Net (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Inventories And Other Non Current Assets [Abstract]
Derivative assets-noncurrent	$ 629.8	$ 830.9
Equity method investments	152.9	139.0
Other assets	111.1	83.5
Other assets, net	$ 893.8	$ 1,053.4