Segment Information Revenue From External Customers By Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ 39,735	$ 37,740	$ 77,076	$ 72,953
UNITED STATES
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	38,670	36,716	74,980	70,960
Non-US [Member]
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	1,067	1,030	2,102	2,002
Operating Segments
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	39,737	37,746	77,082	72,962
Corporate
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ (2)	$ (6)	$ (6)	$ (9)