Acquisitions, Disposals and Other Transactions (Fiscal 2020) (Narrative) (Details) $ in Millions	1 Months Ended					12 Months Ended
	May 31, 2020	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) TelevisionStation	Oct. 31, 2019 USD ($)	May 31, 2019 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired						$ 51	$ 1,061	$ 0
Consideration transferred allocated to goodwill						3,435	3,409	2,691
Cash paid to acquire businesses						51	1,102	0
Sale of investments						0	349	$ 0
The Stars Group Inc.
Business Acquisition [Line Items]
Payments to acquire investments					$ 236
Percentage of ownership of equity interest					4.99%
FanDuel Group
Business Acquisition [Line Items]
Percentage of ownership interest that can be acquired in the future	18.50%
Option term to acquire an equity interest	10 years
Flutter Entertainment plc
Business Acquisition [Line Items]
Payments to acquire investments						$ 55	100
Percentage of ownership of equity interest						2.50%
Roku, Inc.
Business Acquisition [Line Items]
Payments to acquire investments			$ 40
Sale of investments			$ 340
Change in fair value, loss							$ 210
WJZY and WMYT Television Stations | Disposal
Business Acquisition [Line Items]
Number of television stations sold | TelevisionStation			2
Disposition, cash received			$ 45
Maximum | The Stars Group Inc.'s U S Business
Business Acquisition [Line Items]
Percentage of ownership interest that can be acquired in the future					50.00%
Tubi, Inc.
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired		$ 445
Consideration transferred		470
Consideration transferred allocated to amortizable intangible assets		130
Consideration transferred allocated to goodwill		320
Potential additional consideration to be recognized as compensation expense		$ 45
Tubi, Inc. | Minimum
Business Acquisition [Line Items]
Consideration transferred allocated to amortizable intangible assets, useful life		3 years
Tubi, Inc. | Maximum
Business Acquisition [Line Items]
Consideration transferred allocated to amortizable intangible assets, useful life		10 years
KCPQ, KZJO and WITI Television Stations
Business Acquisition [Line Items]
Consideration transferred			350
Consideration transferred allocated to amortizable intangible assets			$ 100
Number of television stations acquired | TelevisionStation			3
Cash paid to acquire businesses			$ 350
Consideration transferred allocated to intangible assets			210
Consideration transferred allocated to property, plant and equipment			$ 30
KCPQ, KZJO and WITI Television Stations | Retransmission Agreements
Business Acquisition [Line Items]
Consideration transferred allocated to amortizable intangible assets, useful life			8 years
KCPQ, KZJO and WITI Television Stations | FCC licenses
Business Acquisition [Line Items]
Consideration transferred allocated to intangible assets with indefinite lives			$ 110
Credible Labs Inc.
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired				$ 260
Consideration transferred				260
Consideration transferred allocated to amortizable intangible assets				75
Consideration transferred allocated to goodwill				$ 285
Business acquisition, percentage of equity acquired				67.00%
Provisional valuation, percentage of acquired business				100.00%
Consideration transferred allocated to redeemable noncontrolling interests				$ (110)
Credible Labs Inc. | Credible Labs Inc.
Business Acquisition [Line Items]
Remaining percentage of equity not acquired by parent				33.00%
Credible Labs Inc. | Minimum
Business Acquisition [Line Items]
Consideration transferred allocated to amortizable intangible assets, useful life				5 years
Credible Labs Inc. | Maximum
Business Acquisition [Line Items]
Consideration transferred allocated to amortizable intangible assets, useful life				10 years