Goodwill and Other Intangible Assets - Schedule Of Identifiable Intangible Assets (Details) - USD ($) $ in Millions	May 31, 2020	May 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 838	$ 888
Accumulated Amortization	(516)	(472)
Net Book Value	322	416
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	641	685
Accumulated Amortization	(327)	(293)
Net Book Value	314	392
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	65	66
Accumulated Amortization	(57)	(51)
Net Book Value	8	15
Trademarks and other [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	132	137
Accumulated Amortization	$ (132)	(128)
Net Book Value		$ 9