Pension Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
May 31, 2013
Pension Benefits, U.S. Plans
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
Contribution to retirement plans in current fiscal year	$ 27.4
Pension Benefits, Non-U.S. Plans
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
Contribution to retirement plans in current fiscal year	$ 7.4

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

No definition available.

Name:	us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration