Segment Information Revenue From External Customers By Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ 41,541	$ 39,735	$ 80,606	$ 77,076
UNITED STATES
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	40,360	38,670	78,336	74,980
Non-US [Member]
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	1,186	1,067	2,279	2,102
Operating Segments
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	41,546	39,737	80,615	77,082
Corporate
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ (5)	$ (2)	$ (9)	$ (6)