Segment Information Revenue From External Customers By Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ 39,157	$ 35,228	$ 116,233	$ 108,181
UNITED STATES
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	38,073	34,230	113,053	105,190
Non-US [Member]
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	1,090	1,002	3,192	3,004
Operating Segments
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	39,163	35,232	116,245	108,194
Corporate
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ (6)	$ (4)	$ (12)	$ (13)