Income Taxes - Additional Information (Detail) - USD ($)				3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 01, 2018	Dec. 22, 2017	Dec. 21, 2017	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017	May 31, 2018
Income Tax Disclosure [Abstract]
Corporate income tax rate		21.00%	35.00%		35.00%	21.00%	35.00%
Corporate tax rate reduction effective date	Jan. 01, 2018
Percentage of blended rate	29.20%
Provisional income tax expense (benefit)								$ 7,300,000
Provisional income tax expense (benefit) related to provisional re-measurement of deferred tax assets and liabilities						$ 0		(15,700,000)
Provisional income tax benefit for the partial reversal of existing deferred tax liabilities								44,900,000
Provisional charge for the transition tax on previously deferred foreign earnings								67,900,000
Effective income tax expense rate				26.20%	12.20%	24.70%	19.60%
Discrete benefits for excess tax benefits related to equity compensation					$ 2,000,000		$ 3,500,000
Discrete tax adjustments for excess tax benefits related to foreign legal entity restructuring and planning					$ (18,000,000)		(18,000,000)
Discrete tax expense (benefit)							$ (9,000,000)
Deferred income tax liability				$ 19,100,000		$ 19,100,000		19,900,000
Unremitted foreign earnings				419,500,000		419,500,000		$ 549,800,000
Provision for deferred income taxes				$ 0		$ 0