CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]		Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]		Treasury Stock [Member]	Accumulated Other Comprehensive Net (Loss) Income [Member]	Accumulated Other Comprehensive Net (Loss) Income [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes	$ 542			$ 159	$ 928	$ 2,440			$ (2,442)	$ (543)
Balance, amount at Jun. 30, 2017	542			$ 159	928	2,440			$ (2,442)	(543)
Balance, shares (in shares) at Jun. 30, 2017				158,741					29,727
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes	726	$ (3)	[1]	$ 159	975	2,797	$ 36	[1]	$ (2,658)	(547)	$ (39)	[1]
Net earnings	823					823
Other comprehensive (loss) income	(4)									(4)
Dividends	(467)					(467)
Stock-based compensation	53				53
Other employee stock plan activities	51				(6)	1			$ 56
Other employee stock plan activities (in shares)									1,139
Treasury stock purchased	$ (272)								$ (272)
Treasury stock purchased (in shares)	(2,171)								(2,171)
Balance, shares (in shares) at Jun. 30, 2018				158,741					30,759
Balance, amount at Jun. 30, 2018	$ 726	(3)	[1]	$ 159	975	2,797	36	[1]	$ (2,658)	(547)	(39)	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes	726	(3)	[1]	159	975	2,797	36	[1]	(2,658)	(547)	(39)	[1]
Cumulative effect of accounting changes	726	22	[2]	$ 159	1,046	3,150	22	[2]	(3,194)	(602)	(39)
Net earnings	820					820
Other comprehensive (loss) income	(16)									(16)
Dividends	(503)					(503)
Stock-based compensation	43				43
Other employee stock plan activities	152				28	0			$ 124
Other employee stock plan activities (in shares)									2,178
Treasury stock purchased	$ (660)								$ (660)
Treasury stock purchased (in shares)	(4,474)								(4,474)
Balance, shares (in shares) at Jun. 30, 2019				158,741					33,055
Balance, amount at Jun. 30, 2019	$ 559	22	[2]	$ 159	1,046	3,150	22	[2]	$ (3,194)	(602)	(39)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Cumulative effect of accounting changes	$ 559	22	[2]	159	1,046	3,150	22	[2]	(3,194)	(602)	(39)
Cumulative effect of accounting changes	908	$ 22	[2]	$ 159	1,137	3,567	$ 22	[2]	(3,315)	(602)	$ (39)
Net earnings	939					939
Other comprehensive (loss) income	(38)									(38)
Dividends	(544)					(544)
Stock-based compensation	50				50
Other employee stock plan activities	162				41	0			$ 121
Other employee stock plan activities (in shares)									2,043
Treasury stock purchased	$ (242)								$ (242)
Treasury stock purchased (in shares)	(1,531)								(1,531)
Balance, shares (in shares) at Jun. 30, 2020				158,741					32,543
Balance, amount at Jun. 30, 2020	$ 908			$ 159	1,137	3,567			$ (3,315)	(640)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Cumulative effect of accounting changes	$ 908			$ 159	$ 1,137	$ 3,567			$ (3,315)	$ (640)

[1] As a result of adopting ASU No. 2014-09, “Revenue from Contracts with Customers (ASC 606),” on July 1, 2018, the Company recorded a cumulativeeffect of initially applying the new guidance as an adjustment to the fiscal year 2019 opening balance of Retained earnings.

[2] As a result of adopting ASU No. 2016-02, “Leases (ASC 842),” on July 1, 2019, the Company recorded a cumulative effect of initially applying the newguidance as an adjustment to the fiscal year 2020 opening balance of Retained earnings. See Note 1 for more information.