Segment Information Revenue From External Customers By Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ 54,878	$ 54,868	$ 162,419	$ 166,960
UNITED STATES
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	54,498	54,464	161,247	165,783
Non-US [Member]
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	399	425	1,235	1,241
Operating Segments
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	54,897	54,889	162,482	167,024
Corporate
Segment Revenue from External Customers by Geographic Area [Line Items]
Revenue	$ (19)	$ (21)	$ (63)	$ (64)