Income Taxes - Summary of Consolidated Income (Loss) Before Provision (Benefit) for Income Taxes and Equity in Net (Income) Loss of Affiliates and Components of Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated income before provision for income taxes and equity in net income of affiliates:
Domestic	$ 457.3	$ 344.7	$ 228.0
Foreign	881.0	686.8	559.4
Consolidated income before provision for income taxes and equity in net income of affiliates	1,338.3	1,031.5	787.4
Domestic provision for income taxes:
Current provision	46.6	45.4	24.3
Deferred provision	99.2	55.0	47.0
Total domestic provision	145.8	100.4	71.3
Foreign provision for income taxes:
Current provision	220.0	191.5	155.1
Deferred provision (benefit)	4.4	(6.4)	(105.0)
Total foreign provision	224.4	185.1	50.1
Provision for income taxes	$ 370.2	$ 285.5	$ 121.4