Shareholders' Equity (Narrative) (Details) $ / shares in Units, $ in Millions	12 Months Ended			36 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) shares
Class of Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method | $	$ 1,907	$ 1,000	$ 200
Payments for Repurchase of Common Stock | $	2,000	1,000	200
Retained earnings decrease | $	$ 534	$ 280		$ 534
Common shares, authorized	755,000,000	755,000,000		755,000,000
Preferred shares, authorized	500,000	500,000		500,000
Common Class A
Class of Stock [Line Items]
Common shares, authorized	750,000,000	750,000,000		750,000,000
Common Stock, Voting Rights, Votes	1
Common Class B
Class of Stock [Line Items]
Common shares, authorized	5,000,000	5,000,000		5,000,000
Treasury Stock, Common
Class of Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method | $	$ 1,907	$ 1,000	$ 200
Treasury Stock, Shares, Acquired	24,600,000	19,500,000	3,700,000
Payments for Repurchase of Common Stock | $				$ 3,100
Treasury shares acquired, average price per share (in usd per share) | $ / shares			$ 54.40
Treasury Stock, Common | $200 million share repurchase program [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired		3,600,000
Treasury shares acquired, average price per share (in usd per share) | $ / shares		$ 56.02
Treasury Stock, Common | $300 million share repurchase program [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired		6,100,000
Treasury shares acquired, average price per share (in usd per share) | $ / shares		$ 49.39
Treasury Stock, Common | $500 million share repurchase program [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	4,600,000	9,800,000
Treasury shares acquired, average price per share (in usd per share) | $ / shares	$ 87.18	$ 51.10
Treasury Stock, Common | $250 million share repurchase program
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	3,200,000
Treasury shares acquired, average price per share (in usd per share) | $ / shares	$ 77.50
Treasury Stock, Common | Second $250 million share repurchase program [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	3,200,000
Treasury shares acquired, average price per share (in usd per share) | $ / shares	$ 77.27
Treasury Stock, Common | $1 billion share repurchase program
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	13,600,000
Treasury shares acquired, average price per share (in usd per share) | $ / shares	$ 73.36