Consolidated Statement of Changes in Shareholder's Equity - USD ($)	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive (Loss)/Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redeemable Preferred Stock Outstandings	$ 0
Beginning Balance at Jun. 30, 2018	1,086,000,000		$ 1,000,000	$ 2,283,000,000	$ (872,000,000)		$ (326,000,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Other		$ 15,000,000				$ 15,000,000
Stock Issued During Period, Value, New Issues	447,000,000		1,000,000	446,000,000
Stock Issued During Period, Value, Stock Options Exercised	0		0
Equity compensation	33,000,000			33,000,000
Payments Related to Tax Withholding for Share-based Compensation	(15,000,000)			(15,000,000)
Equity issued in lieu of cash consideration	10,000,000			10,000,000
Dividends, Preferred Stock	(3,000,000)				(3,000,000)
Net Income (Loss) Attributable to Parent	137,000,000				137,000,000
Other comprehensive income /(loss), net of tax	(28,000,000)						(28,000,000)
Ending Balance at Jun. 30, 2019	1,682,000,000		2,000,000	2,757,000,000	(723,000,000)		(354,000,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Temporary Equity, Stock Issued During Period, Value, New Issues	607,000,000
Redeemable Preferred Stock Outstandings	607,000,000
Stock Issued During Period, Value, New Issues	1,042,000,000		0	1,042,000,000
Stock Issued During Period, Value, Stock Options Exercised	0		0
Equity compensation	48,000,000			48,000,000
Payments Related to Tax Withholding for Share-based Compensation	(32,000,000)			(32,000,000)
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	3,000,000			3,000,000
Dividends, Preferred Stock	(33,000,000)				(33,000,000)
Net Income (Loss) Attributable to Parent	221,000,000				221,000,000
Other comprehensive income /(loss), net of tax	(32,000,000)						(32,000,000)
Ending Balance at Jun. 30, 2020	2,899,000,000		2,000,000	3,818,000,000	(535,000,000)		(386,000,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redeemable Preferred Stock Outstandings	607,000,000
Stock Issued During Period, Value, New Issues	82,000,000		0	82,000,000
Stock Issued During Period, Value, Stock Options Exercised	0		0
Stock Issued During Period, Value, Conversion of Convertible Securities	253,000,000			253,000,000
Equity compensation	51,000,000			51,000,000
Payments Related to Tax Withholding for Share-based Compensation	(46,000,000)			(46,000,000)
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	38,000,000			38,000,000
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	9,000,000			9,000,000
Dividends, Preferred Stock	(25,000,000)				(25,000,000)
Net Income (Loss) Attributable to Parent	585,000,000				585,000,000
Other comprehensive income /(loss), net of tax	69,000,000						69,000,000
Ending Balance at Jun. 30, 2021	3,915,000,000		$ 2,000,000	$ 4,205,000,000	$ 25,000,000		$ (317,000,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Temporary Equity, Carrying Amount, Period Increase (Decrease)	(248,000,000)
Redeemable Preferred Stock Outstandings	$ 359,000,000