Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income/(Loss)	Noncontrolling Interest
Balance at beginning of period (in shares) at Jun. 30, 2020		327,000
Balance at beginning of period at Jun. 30, 2020	$ 1,792	$ 2,789	$ 1,170		$ (104)	$ 3
Treasury, balance at beginning of period (in shares) at Jun. 30, 2020				(35,000)
Treasury, balance at beginning of period at Jun. 30, 2020				$ (2,066)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	497					2
Net Income (Loss) Attributable to Parent	495
Other Comprehensive Income (Loss), Net of Tax	56
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	56				56
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		2,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	82	$ 18		$ 64
Purchase of treasury shares	(200)
Treasury shares acquired (in shares)				(4,000)
Dividends	(432)		(432)
Stockholders' Equity, Other Shares				(1,000)
Other	1					1
Balance at end of period (in shares) at Mar. 31, 2021		327,000
Balance at end of period at Mar. 31, 2021	1,794	$ 2,807	1,233		(48)	4
Treasury, balance at end of period (in shares) at Mar. 31, 2021				(36,000)
Treasury, balance at end of period at Mar. 31, 2021				$ (2,202)
Treasury Stock, Value, Acquired, Cost Method	(200)			$ (200)
Balance at beginning of period (in shares) at Dec. 31, 2020		327,000
Balance at beginning of period at Dec. 31, 2020	1,975	$ 2,778	1,255		(53)	4
Treasury, balance at beginning of period (in shares) at Dec. 31, 2020				(33,000)
Treasury, balance at beginning of period at Dec. 31, 2020				$ (2,009)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	120					1
Net Income (Loss) Attributable to Parent	119
Other Comprehensive Income (Loss), Net of Tax	5
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	5				5
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	36	$ 29		$ 7
Purchase of treasury shares	(200)
Treasury shares acquired (in shares)				(3,700)
Dividends	(143)		(143)
Stockholders' Equity, Other Shares				(1,000)
Other	(1)		2			1
Balance at end of period (in shares) at Mar. 31, 2021		327,000
Balance at end of period at Mar. 31, 2021	1,794	$ 2,807	1,233		(48)	4
Treasury, balance at end of period (in shares) at Mar. 31, 2021				(36,000)
Treasury, balance at end of period at Mar. 31, 2021				$ (2,202)
Treasury Stock, Value, Acquired, Cost Method	$ (200)			$ (200)
Balance at beginning of period (in shares) at Jun. 30, 2021	327,000	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)			36,000
Treasury, balance at beginning of period at Jun. 30, 2021	$ (2,186)			$ 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	1,000	0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 41	$ (5)		$ 46
Purchase of treasury shares	(1,000)	$ 40
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	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)			(54,000)
Treasury, balance at end of period at Mar. 31, 2022	$ (3,100)			$ (3,100)
Treasury Stock, Value, Acquired, Cost Method	(1,000)			$ (960)
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
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	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)			(54,000)
Treasury, balance at end of period at Mar. 31, 2022	$ (3,100)			$ (3,100)
Treasury Stock, Value, Acquired, Cost Method	$ (200)			$ (220)