Revenue and Segment Disclosures Revenue classified by timing of recognition (Details) - USD ($) $ in Millions	3 Months Ended
	May 31, 2020	May 31, 2019
Revenue classified by timing of recognition [Line Items]
Revenues	$ 206	$ 247
Transferred over Time [Member]
Revenue classified by timing of recognition [Line Items]
Revenues	116	152
Transferred at Point in Time [Member]
Revenue classified by timing of recognition [Line Items]
Revenues	$ 90	$ 95