Equity - Restrictions on Net Assets (Details) $ in Millions	May 31, 2018 USD ($)
MMJ Group
Restrictions for Consolidated and Unconsolidated Subsidiaries [Abstract]
Amount of restricted net assets	$ 3,980
MSTW and MTTW
Restrictions for Consolidated and Unconsolidated Subsidiaries [Abstract]
Amount of restricted net assets	4,060
IM Flash Technologies, LLC
Restrictions for Consolidated and Unconsolidated Subsidiaries [Abstract]
Amount of restricted net assets	$ 885