Revenue Classified by Significant Product and Service Offerings (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenue from External Customer [Line Items]
Revenue	$ 43,076	$ 36,906	$ 80,230	$ 69,961
Server Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	12,729	10,119	23,924	19,311
Office Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	9,881	8,983	19,159	17,449
Windows
Revenue from External Customer [Line Items]
Revenue	5,716	5,593	11,021	10,946
Gaming
Revenue from External Customer [Line Items]
Revenue	5,031	3,327	8,123	5,869
LinkedIn
Revenue from External Customer [Line Items]
Revenue	2,577	2,102	4,783	4,011
Search Advertising
Revenue from External Customer [Line Items]
Revenue	2,184	2,163	3,973	4,154
Devices
Revenue from External Customer [Line Items]
Revenue	2,120	2,048	3,740	3,250
Enterprise Services
Revenue from External Customer [Line Items]
Revenue	1,695	1,612	3,332	3,157
Other
Revenue from External Customer [Line Items]
Revenue	$ 1,143	$ 959	$ 2,175	$ 1,814