Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Tax benefits recognized for net operating loss carryforwards	$ 0.6	$ 16.0	$ 4.5
Investments reinvested outside the country of domicile	4,100.0
Estimated deferred tax liability	300.0
Foreign earnings included in domestic taxable income	249.7	249.0	241.7
Foreign earnings included in domestic taxable income, domestic taxes	12.2	18.6	19.5
Net operating loss carryforwards	397.0
Deferred tax asset related to operating loss carryforwards	63.6	67.2
Valuation allowance	$ 32.9	30.3
Carryforward description	The carryforward periods range from five years to indefinite, subject to certain limitations under applicable laws.
Cash paid for income taxes	$ 879.7	689.9	434.0
Unrecognized tax benefits	19.1	12.0	13.1	$ 23.4
Unrecognized tax benefits that, if recognized, would affect the effective tax rate	9.9	1.1	1.5
Income related to interest	1.9	0.8	1.1
Accrued interest expense and penalties	2.8	$ 4.7	$ 5.5
Settlement with Taxing Authority
Income Taxes [Line Items]
Unrecognized tax benefits, resulting from intercompany transactions	$ 7.0
Other Major Jurisdictions | Earliest Tax Year
Income Taxes [Line Items]
Tax year remain subject to examination	2005
Other Major Jurisdictions | Latest Tax Year
Income Taxes [Line Items]
Tax year remain subject to examination	2015
Net Operating Loss Carryforwards
Income Taxes [Line Items]
Deferred tax asset related to operating loss carryforwards	$ 62.7
Valuation allowance	$ 30.7
Minimum
Income Taxes [Line Items]
Operating loss carryforwards periods	5 years
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Tax examinations	The United States Internal Revenue Service has completed examinations of the Company's tax returns for all years through 2010.
Foreign
Income Taxes [Line Items]
Net operating loss carryforwards	$ 186.3
United States
Income Taxes [Line Items]
Net operating loss carryforwards	$ 210.7