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	377					1
Net Income (Loss) Attributable to Parent	376
Other Comprehensive Income (Loss), Net of Tax	51
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	51				51
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		2,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	46	$ (11)		$ 57
Purchase of treasury shares	0
Dividends	(289)		(289)
Other	2		(2)			0
Balance at end of period (in shares) at Dec. 31, 2020		327,000
Balance at end of period at Dec. 31, 2020	1,975	$ 2,778	1,255		(53)	4
Treasury, balance at end of period (in shares) at Dec. 31, 2020				(33,000)
Treasury, balance at end of period at Dec. 31, 2020				$ (2,009)
Balance at beginning of period (in shares) at Sep. 30, 2020		327,000
Balance at beginning of period at Sep. 30, 2020	1,425	$ 2,760	771		(87)	3
Treasury, balance at beginning of period (in shares) at Sep. 30, 2020				(33,000)
Treasury, balance at beginning of period at Sep. 30, 2020				$ (2,022)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	630					1
Net Income (Loss) Attributable to Parent	629
Other Comprehensive Income (Loss), Net of Tax	34
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	34				34
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	30	$ 17		$ 13
Dividends	(144)		(144)
Other	0	$ 1	(1)			0
Balance at end of period (in shares) at Dec. 31, 2020		327,000
Balance at end of period at Dec. 31, 2020	$ 1,975	$ 2,778	1,255		(53)	4
Treasury, balance at end of period (in shares) at Dec. 31, 2020				(33,000)
Treasury, balance at end of period at Dec. 31, 2020				$ (2,009)
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
Balance at end of period (in shares) at Sep. 30, 2021		327,000
Balance at end of period at Sep. 30, 2021	$ 1,396	$ 2,666	1,335		(61)	3
Treasury, balance at end of period (in shares) at Sep. 30, 2021				43,000
Treasury, balance at end of period at Sep. 30, 2021				$ 2,547
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	321					1
Net Income (Loss) Attributable to Parent	320
Other Comprehensive Income (Loss), Net of Tax	(51)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (51)				(51)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	1,000	0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 18	$ (25)		$ 43
Purchase of treasury shares	(800)	$ 60
Treasury shares acquired (in shares)				(15,000)
Dividends	(280)		(280)
Stockholders' Equity, Other Shares
Other	$ 0		0			0
Balance at end of period (in shares) at Dec. 31, 2021	327,000	327,000
Balance at end of period at Dec. 31, 2021	$ 1,002	$ 2,721	1,245		(85)	4
Treasury, balance at end of period (in shares) at Dec. 31, 2021	(50,000)			(50,000)
Treasury, balance at end of period at Dec. 31, 2021	$ (2,883)			$ (2,883)
Treasury Stock, Value, Acquired, Cost Method	(800)			$ (740)
Balance at beginning of period (in shares) at Sep. 30, 2021		327,000
Balance at beginning of period at Sep. 30, 2021	1,396	$ 2,666	1,335		(61)	3
Treasury, balance at beginning of period (in shares) at Sep. 30, 2021				43,000
Treasury, balance at beginning of period at Sep. 30, 2021				$ 2,547
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	49					0
Net Income (Loss) Attributable to Parent	49
Other Comprehensive Income (Loss), Net of Tax	(24)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(24)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	19	$ 15		$ 4
Purchase of treasury shares		(40)
Treasury shares acquired (in shares)				(7,000)
Dividends	(139)		(139)
Stockholders' Equity, Other Shares
Other	$ (1)		0			1
Balance at end of period (in shares) at Dec. 31, 2021	327,000	327,000
Balance at end of period at Dec. 31, 2021	$ 1,002	$ 2,721	$ 1,245		$ (85)	$ 4
Treasury, balance at end of period (in shares) at Dec. 31, 2021	(50,000)			(50,000)
Treasury, balance at end of period at Dec. 31, 2021	$ (2,883)			$ (2,883)
Treasury Stock, Value, Acquired, Cost Method	$ (300)			$ (340)