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				54,000
Balance at beginning of period (in shares) at Jun. 30, 2022		327,000
Balance at beginning of period at Jun. 30, 2022	$ (706)	$ 2,813	$ (280)		$ (114)	$ 3
Treasury, balance at beginning of period (in shares) at Jun. 30, 2022				(54,000)
Treasury, balance at beginning of period at Jun. 30, 2022				$ (3,128)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(19)					1
Net Income (Loss) Attributable to Parent	(20)
Other Comprehensive Income (Loss), Net of Tax	(32)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(32)				(32)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		2,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	58	$ (16)		$ 74
Purchase of treasury shares	(1,250)	$ 50		$ (1,300)
Treasury shares acquired (in shares)				(16,000)
Dividends	(260)		(260)
Stockholders' Equity, Other Shares
Other	1					1
Balance at end of period (in shares) at Dec. 31, 2022		327,000
Balance at end of period at Dec. 31, 2022	(2,212)	$ 2,747	(560)		(146)	1
Treasury, balance at end of period (in shares) at Dec. 31, 2022				(68,000)
Treasury, balance at end of period at Dec. 31, 2022				$ (4,254)
Treasury Stock, Value, Acquired, Cost Method	(1,250)			$ (1,200)
Purchase of noncontrolling interests	2					2
Common shares in treasury				65,000
Balance at beginning of period (in shares) at Sep. 30, 2022		327,000
Balance at beginning of period at Sep. 30, 2022	(1,780)	$ 2,576	(301)		(176)	1
Treasury, balance at beginning of period (in shares) at Sep. 30, 2022				(65,000)
Treasury, balance at beginning of period at Sep. 30, 2022				$ (3,880)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(130)					0
Net Income (Loss) Attributable to Parent	(130)
Other Comprehensive Income (Loss), Net of Tax	30
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	30				30
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		1,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	47	$ 21		$ 26
Purchase of treasury shares		$ (150)
Treasury shares acquired (in shares)				(4,000)
Dividends	(129)		(129)
Balance at end of period (in shares) at Dec. 31, 2022		327,000
Balance at end of period at Dec. 31, 2022	(2,212)	$ 2,747	(560)		(146)	1
Treasury, balance at end of period (in shares) at Dec. 31, 2022				(68,000)
Treasury, balance at end of period at Dec. 31, 2022				$ (4,254)
Treasury Stock, Value, Acquired, Cost Method	$ (250)			$ (400)
Common shares in treasury				68,000
Common shares in treasury	76,000			(76,000)
Balance at beginning of period (in shares) at Jun. 30, 2023	327,000	327,000
Balance at beginning of period at Jun. 30, 2023	$ (2,851)	$ 2,747	(534)		(151)	1
Treasury, balance at beginning of period (in shares) at Jun. 30, 2023	(76,000)			76,000
Treasury, balance at beginning of period at Jun. 30, 2023	$ (4,914)			$ 4,914
Balance at end of period (in shares) at Sep. 30, 2023		327,000
Balance at end of period at Sep. 30, 2023	$ (3,490)	$ 2,728	(654)		(165)	1
Treasury, balance at end of period (in shares) at Sep. 30, 2023				80,000
Treasury, balance at end of period at Sep. 30, 2023				$ 5,400
Balance at beginning of period (in shares) at Jun. 30, 2023	327,000	327,000
Balance at beginning of period at Jun. 30, 2023	$ (2,851)	$ 2,747	(534)		(151)	1
Treasury, balance at beginning of period (in shares) at Jun. 30, 2023	(76,000)			76,000
Treasury, balance at beginning of period at Jun. 30, 2023	$ (4,914)			$ 4,914
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	360					2
Net Income (Loss) Attributable to Parent	358
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	1,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 57	$ 8		49
Purchase of treasury shares	(750)	$ (100)		$ (750)
Treasury shares acquired (in shares)				(9,000)
Dividends	(249)		(249)
Stockholders' Equity, Other Shares				(1,000)
Other	$ 1		0			1
Balance at end of period (in shares) at Dec. 31, 2023	327,000	327,000
Balance at end of period at Dec. 31, 2023	$ (3,447)	$ 2,855	(425)		(155)	2
Treasury, balance at end of period (in shares) at Dec. 31, 2023	(83,000)			(83,000)
Treasury, balance at end of period at Dec. 31, 2023	$ (5,724)			$ (5,724)
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	(3,490)	$ 2,728	(654)		(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				$ 5,400
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	354					1
Net Income (Loss) Attributable to Parent	353
Other Comprehensive Income (Loss), Net of Tax	10
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	10
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	57	$ 27		$ 30
Purchase of treasury shares		(100)
Treasury shares acquired (in shares)				(4,000)
Dividends	(123)		(123)
Stockholders' Equity, Other Shares				(1,000)
Other	$ 1		(1)			0
Balance at end of period (in shares) at Dec. 31, 2023	327,000	327,000
Balance at end of period at Dec. 31, 2023	$ (3,447)	$ 2,855	$ (425)		$ (155)	$ 2
Treasury, balance at end of period (in shares) at Dec. 31, 2023	(83,000)			(83,000)
Treasury, balance at end of period at Dec. 31, 2023	$ (5,724)			$ (5,724)
Treasury Stock, Value, Acquired, Cost Method	$ (254)			$ (354)
Common shares in treasury	83,000			83,000