Segment Information Revenue From External Customers By Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ 39,275	$ 39,157	$ 119,881	$ 116,233
UNITED STATES
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	38,089	38,073	116,425	113,053
Non-US [Member]
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	1,189	1,090	3,468	3,192
Operating Segments
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	39,278	39,163	119,893	116,245
Corporate
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ (3)	$ (6)	$ (12)	$ (12)