Income Taxes - Available Domestic and Foreign Loss Carryforwards (Detail) (USD $) In Millions, unless otherwise specified	May 31, 2014
Operating Loss Carryforwards [Line Items]
Net Operating Losses	$ 55
2015
Operating Loss Carryforwards [Line Items]
Net Operating Losses	0
2016
Operating Loss Carryforwards [Line Items]
Net Operating Losses	0
2017
Operating Loss Carryforwards [Line Items]
Net Operating Losses	0
2018
Operating Loss Carryforwards [Line Items]
Net Operating Losses	6
2019 - 2034
Operating Loss Carryforwards [Line Items]
Net Operating Losses	37
Indefinite
Operating Loss Carryforwards [Line Items]
Net Operating Losses	$ 12