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, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated income before provision for income taxes and equity in net income of affiliates:
Domestic	$ 317.4	$ 726.2	$ 449.5
Foreign	636.2	812.2	1,077.2
Consolidated income before provision for income taxes and equity in net income of affiliates	953.6	1,538.4	1,526.7
Domestic (benefit) provision for income taxes:
Current provision	24.2	35.0	25.8
Deferred (benefit) provision	(52.6)	91.5	(46.1)
Total domestic (benefit) provision	(28.4)	126.5	(20.3)
Foreign provision for income taxes:
Current provision	160.1	190.2	253.0
Deferred (benefit) provision	14.4	(4.8)	(35.2)
Total foreign provision	174.5	185.4	217.8
Provision for income taxes	$ 146.1	$ 311.9	$ 197.5