Other Assets, Net - Other Assets, Net (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Inventories And Other Non Current Assets [Abstract]
Derivative assets	$ 672.1	$ 830.9
Equity method investments	152.8	139.0
Other assets	117.1	83.5
Other assets, net	$ 942.0	$ 1,053.4