Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Retained Earnings	Treasury Stock, Common	Accumulated Other Comprehensive Income/(Loss)	Noncontrolling Interest
Common shares in treasury				76,000
Balance at beginning of period (in shares) at Jun. 30, 2023		327,000
Balance at beginning of period at Jun. 30, 2023	$ (2,957)	$ 2,746	$ (642)		$ (151)	$ 1
Treasury, balance at beginning of period (in shares) at Jun. 30, 2023				(76,000)
Treasury, balance at beginning of period at Jun. 30, 2023				$ (4,911)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	358					2
Net Income (Loss) Attributable to Parent	356
Other Comprehensive Income (Loss), Net of Tax	(4)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(4)				(4)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		1,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	65	$ 9		$ 56
Purchase of treasury shares, net	(750)	$ (100)		$ (750)
Treasury shares acquired (in shares)				(9,000)
Dividends	(249)		(249)
Stockholders' Equity, Other Shares
Other	1					1
Balance at end of period (in shares) at Dec. 31, 2023		327,000
Balance at end of period at Dec. 31, 2023	(3,547)	$ 2,855	(535)		(155)	2
Treasury, balance at end of period (in shares) at Dec. 31, 2023				(83,000)
Treasury, balance at end of period at Dec. 31, 2023				$ (5,714)
Treasury Stock, Value, Acquired, Cost Method	(759)			$ (859)
Common shares in treasury				80,000
Balance at beginning of period (in shares) at Sep. 30, 2023		327,000
Balance at beginning of period at Sep. 30, 2023	(3,607)	$ 2,728	(780)		(165)	1
Treasury, balance at beginning of period (in shares) at Sep. 30, 2023				(80,000)
Treasury, balance at beginning of period at Sep. 30, 2023				$ (5,391)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	369					1
Net Income (Loss) Attributable to Parent	368
Other Comprehensive Income (Loss), Net of Tax	10
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	10				10
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	58	$ 27		$ 31
Purchase of treasury shares, net		(100)
Treasury shares acquired (in shares)				(4,000)
Dividends	(123)		(123)
Stockholders' Equity, Other Shares				(1,000)
Other	0
Balance at end of period (in shares) at Dec. 31, 2023		327,000
Balance at end of period at Dec. 31, 2023	(3,547)	$ 2,855	(535)		(155)	2
Treasury, balance at end of period (in shares) at Dec. 31, 2023				(83,000)
Treasury, balance at end of period at Dec. 31, 2023				$ (5,714)
Treasury Stock, Value, Acquired, Cost Method	$ (254)			$ (354)
Common shares in treasury				83,000
Common shares in treasury	83,000			(83,000)
Balance at beginning of period (in shares) at Jun. 30, 2024	327,000	327,000
Balance at beginning of period at Jun. 30, 2024	$ (3,212)	$ 2,917	(286)		(167)	1
Treasury, balance at beginning of period (in shares) at Jun. 30, 2024	(83,000)			83,000
Treasury, balance at beginning of period at Jun. 30, 2024	$ (5,677)			$ 5,677
Balance at end of period (in shares) at Sep. 30, 2024		327,000
Balance at end of period at Sep. 30, 2024	$ (3,276)	$ 2,827	14		(155)	1
Treasury, balance at end of period (in shares) at Sep. 30, 2024				85,000
Treasury, balance at end of period at Sep. 30, 2024				$ 5,963
Balance at beginning of period (in shares) at Jun. 30, 2024	327,000	327,000
Balance at beginning of period at Jun. 30, 2024	$ (3,212)	$ 2,917	(286)		(167)	1
Treasury, balance at beginning of period (in shares) at Jun. 30, 2024	(83,000)			83,000
Treasury, balance at beginning of period at Jun. 30, 2024	$ (5,677)			$ 5,677
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	818					2
Net Income (Loss) Attributable to Parent	816
Other Comprehensive Income (Loss), Net of Tax	(13)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(13)				(13)
Noncontrolling Interest, Increase from Business Combination	$ 72					72
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	1,000	0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 45	$ 15		30
Purchase of treasury shares, net	$ (390)			$ (375)
Treasury shares acquired (in shares)				(3,000)
Retirement of treasury stock	0	(56,000)		(56,000)
Dividends	$ (247)		(247)
Payments to Noncontrolling Interests	4					4
Stockholders' Equity, Other Shares		0
Other	$ 1					1
Balance at end of period (in shares) at Dec. 31, 2024	271,000	271,000
Balance at end of period at Dec. 31, 2024	$ (2,921)	$ 2,932	283		(180)	70
Treasury, balance at end of period (in shares) at Dec. 31, 2024	(29,000)			(29,000)
Treasury, balance at end of period at Dec. 31, 2024	$ (6,026)			$ (6,026)
Treasury Stock, Value, Acquired, Cost Method	(379)			$ (379)
Common shares in treasury				(85,000)
Balance at beginning of period (in shares) at Sep. 30, 2024		327,000
Balance at beginning of period at Sep. 30, 2024	(3,276)	$ 2,827	14		(155)	1
Treasury, balance at beginning of period (in shares) at Sep. 30, 2024				85,000
Treasury, balance at beginning of period at Sep. 30, 2024				$ 5,963
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	401					1
Net Income (Loss) Attributable to Parent	400
Other Comprehensive Income (Loss), Net of Tax	(25)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(25)
Noncontrolling Interest, Increase from Business Combination	72					72
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture				0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 43	30		$ 13
Purchase of treasury shares, net		$ (75)
Treasury shares acquired (in shares)				0
Retirement of treasury stock	0	(56,000)		(56,000)
Dividends	$ (128)		(128)
Payments to Noncontrolling Interests	4					4
Stockholders' Equity, Other Shares
Other	$ 3	$ 0	(3)
Balance at end of period (in shares) at Dec. 31, 2024	271,000	271,000
Balance at end of period at Dec. 31, 2024	$ (2,921)	$ 2,932	$ 283		$ (180)	$ 70
Treasury, balance at end of period (in shares) at Dec. 31, 2024	(29,000)			(29,000)
Treasury, balance at end of period at Dec. 31, 2024	$ (6,026)			$ (6,026)
Treasury Stock, Value, Acquired, Cost Method	$ (1)			$ (76)
Common shares in treasury	29,000			29,000