Goodwill and Intangible Assets, Net (Changes in Carrying Values of Intangible Assets and Related Accumulated Amortization) (Details) $ in Millions	9 Months Ended
	Mar. 31, 2020 USD ($)
Intangible Assets [Line Items]
Intangible assets not subject to amortization, beginning	$ 2,809
Intangible assets not subject to amortization, acquisitions	113	[1]
Intangible assets not subject to amortization, disposals	(30)	[1]
Intangible assets not subject to amortization, ending	2,892
Amortizable intangible assets, net, beginning	42	[2]
Amortizable intangible assets, net, acquisitions	171	[1],[2]
Amortizable intangible assets, net, disposals	0	[1],[2]
Amortizable intangible assets, net, amortization	(21)	[2]
Amortizable intangible assets, net, ending	192	[2]
Total intangible assets, net, beginning	2,851
Total intangible assets, net, acquisitions	284	[1]
Total intangible assets, net, disposals	(30)	[1]
Total intangible assets, net, ending	3,084
FCC licenses
Intangible Assets [Line Items]
Intangible assets not subject to amortization, beginning	2,167
Intangible assets not subject to amortization, acquisitions	113	[1]
Intangible assets not subject to amortization, disposals	(30)	[1]
Intangible assets not subject to amortization, ending	2,250
Other
Intangible Assets [Line Items]
Intangible assets not subject to amortization, beginning	642
Intangible assets not subject to amortization, ending	$ 642

[1] See Note 2—Acquisitions, Disposals and Other Transactions under the heading “Acquisitions and Disposals.”

[2] Net of accumulated amortization of $150 million and $129 million as of March 31, 2020 and June 30, 2019, respectively. The average useful life of amortizable intangible assets ranges from five to 20 years.