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, 2018	Dec. 31, 2017	Dec. 31, 2016
Consolidated income before provision for income taxes and equity in net income of affiliates:
Domestic	$ 726.2	$ 449.5	$ 457.3
Foreign	812.2	1,077.2	881.0
Consolidated income before provision for income taxes and equity in net income of affiliates	1,538.4	1,526.7	1,338.3
Domestic (benefit) provision for income taxes:
Current provision	35.0	25.8	46.6
Deferred (benefit) provision	91.5	(46.1)	99.2
Total domestic (benefit) provision	126.5	(20.3)	145.8
Foreign provision for income taxes:
Current provision	190.2	253.0	220.0
Deferred (benefit) provision	(4.8)	(35.2)	4.4
Total foreign provision	185.4	217.8	224.4
Provision for income taxes	$ 311.9	$ 197.5	$ 370.2