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				36,000
Balance at beginning of period (in shares) at Jun. 30, 2021		327,000
Balance at beginning of period at Jun. 30, 2021	$ 1,794	$ 2,806	$ 1,205		$ (34)	$ 3
Treasury, balance at beginning of period (in shares) at Jun. 30, 2021				(36,000)
Treasury, balance at beginning of period at Jun. 30, 2021				$ (2,186)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(1,069)					2
Net Income (Loss) Attributable to Parent	(1,071)
Other Comprehensive Income (Loss), Net of Tax	(43)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(43)				(43)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		1,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	41	$ (5)		$ 46
Purchase of treasury shares	(1,000)	$ 40		$ (1,000)
Treasury shares acquired (in shares)				(19,000)
Dividends	(415)		(415)
Stockholders' Equity, Other Shares
Other	1					1
Balance at end of period (in shares) at Mar. 31, 2022		327,000
Balance at end of period at Mar. 31, 2022	(693)	$ 2,761	(281)		(77)	4
Treasury, balance at end of period (in shares) at Mar. 31, 2022				(54,000)
Treasury, balance at end of period at Mar. 31, 2022				$ (3,100)
Treasury Stock, Value, Acquired, Cost Method	(1,000)			$ (960)
Common shares in treasury				50,000
Balance at beginning of period (in shares) at Dec. 31, 2021		327,000
Balance at beginning of period at Dec. 31, 2021	1,002	$ 2,721	1,245		(85)	4
Treasury, balance at beginning of period (in shares) at Dec. 31, 2021				(50,000)
Treasury, balance at beginning of period at Dec. 31, 2021				$ (2,883)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(1,390)					1
Net Income (Loss) Attributable to Parent	(1,391)
Other Comprehensive Income (Loss), Net of Tax	8
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	8				8
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	23	$ 20		$ 3
Purchase of treasury shares		(20)
Treasury shares acquired (in shares)				(4,000)
Dividends	(135)		(135)
Stockholders' Equity, Other Shares
Other	1					1
Balance at end of period (in shares) at Mar. 31, 2022		327,000
Balance at end of period at Mar. 31, 2022	(693)	$ 2,761	(281)		(77)	4
Treasury, balance at end of period (in shares) at Mar. 31, 2022				(54,000)
Treasury, balance at end of period at Mar. 31, 2022				$ (3,100)
Treasury Stock, Value, Acquired, Cost Method	$ (200)			$ (220)
Common shares in treasury				54,000
Common shares in treasury	54,000			(54,000)
Balance at beginning of period (in shares) at Jun. 30, 2022	327,000	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)			54,000
Treasury, balance at beginning of period at Jun. 30, 2022	$ (3,128)			$ 3,128
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	328					3
Net Income (Loss) Attributable to Parent	325
Other Comprehensive Income (Loss), Net of Tax	(28)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (28)				(28)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	2,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 82	$ 5		77
Purchase of treasury shares	(1,500)			$ (1,500)
Treasury shares acquired (in shares)				(20,000)
Dividends	(388)		(388)
Stockholders' Equity, Other Shares
Other	$ 1		(1)			2
Balance at end of period (in shares) at Mar. 31, 2023	327,000	327,000
Balance at end of period at Mar. 31, 2023	$ (2,218)	$ 2,818	(342)		(142)	2
Treasury, balance at end of period (in shares) at Mar. 31, 2023	(72,000)			(72,000)
Treasury, balance at end of period at Mar. 31, 2023	$ (4,554)			$ (4,554)
Treasury Stock, Value, Acquired, Cost Method	(1,503)			$ (1,503)
Treasury shares acquired, average price per share (in usd per share)	(2)					(2)
Common shares in treasury				(68,000)
Balance at beginning of period (in shares) at Dec. 31, 2022		327,000
Balance at beginning of period at Dec. 31, 2022	(2,212)	$ 2,747	(560)		(146)	1
Treasury, balance at beginning of period (in shares) at Dec. 31, 2022				68,000
Treasury, balance at beginning of period at Dec. 31, 2022				$ 4,254
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	347					2
Net Income (Loss) Attributable to Parent	345
Other Comprehensive Income (Loss), Net of Tax	4
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	24	$ 21		$ 3
Purchase of treasury shares		(50)
Treasury shares acquired (in shares)				(4,000)
Dividends	(128)		(128)
Stockholders' Equity, Other Shares
Other	$ 0		1			(1)
Balance at end of period (in shares) at Mar. 31, 2023	327,000	327,000
Balance at end of period at Mar. 31, 2023	$ (2,218)	$ 2,818	$ (342)		$ (142)	$ 2
Treasury, balance at end of period (in shares) at Mar. 31, 2023	(72,000)			(72,000)
Treasury, balance at end of period at Mar. 31, 2023	$ (4,554)			$ (4,554)
Treasury Stock, Value, Acquired, Cost Method	$ (253)			$ (303)
Common shares in treasury	72,000			72,000