Unearned Revenue by Segment (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020
Contract With Customer Liability [Line Items]
Unearned revenue	$ 36,305	$ 39,180
Productivity and Business Processes
Contract With Customer Liability [Line Items]
Unearned revenue	17,675	18,643
Intelligent Cloud
Contract With Customer Liability [Line Items]
Unearned revenue	15,039	16,620
More Personal Computing
Contract With Customer Liability [Line Items]
Unearned revenue	$ 3,591	$ 3,917