Income Taxes - Additional information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 01, 2017	Dec. 31, 2013
Income Taxes [Line Items]
Unrecognized net operating loss carryforwards, foreign	$ 5.4	$ 1.7	$ 10.0
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
Foreign jurisdictions income with tax holidays	$ 89.7	$ 72.2	$ 57.6
Valuation allowance for deferred tax assets	445.6	495.7
Net increase (decrease) in valuation allowance	(50.1)
Undistributed earnings on which deferred tax liability is not provided	1,700.0
Tax loss carryforwards	1,900.0
Tax loss carryforwards with no expiration date	1,700.0
Tax loss carryforwards with expiration date	201.3
Tax credit carryforwards	242.4
Tax benefits related to share-based payment awards, increase in long-term deferred tax assets	459.4	600.4
Unrecognized tax benefits	29.5	30.4	$ 39.7		$ 45.2
Unrecognized tax benefits, interest and penalties	7.8	7.5
Interest and penalties, that if recognized would affect effective tax rate	7.8	$ 7.4
Decrease in unrecognized tax benefits, reasonably possible during the next twelve months	2.5
U.S.
Income Taxes [Line Items]
Valuation allowance for deferred tax assets	33.8
International jurisdictions
Income Taxes [Line Items]
Valuation allowance for deferred tax assets	$ 411.8
Accounting Standards Update 2016-09 | Subsequent event
Income Taxes [Line Items]
Tax benefits related to share-based payment awards, increase in long-term deferred tax assets				$ 54.5
Retained earnings | Accounting Standards Update 2016-09 | Subsequent event
Income Taxes [Line Items]
Increase (decrease) in equity from elimination of amounts in long-term deferred tax assets and additional paid-in capital				$ 54.5