Stock Incentive Plan and Employee Stock Purchase Plan - Summary of Activity of RSUs, PSUs and MSUs (Details) - $ / shares	12 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Restricted Stock Units
Total Number of Shares Underlying
Unvested at the beginning of the year (in shares)	3,084,000	3,700,000	3,884,000
Granted (in shares)	2,009,000	1,386,000	1,529,000
Vested (in shares)	(1,579,000)	(1,481,000)	(1,167,000)
Cancelled/Forfeited (in shares)	(343,000)	(521,000)	(546,000)
Unvested at the end of the year (in shares)	3,171,000	3,084,000	3,700,000
Weighted Average Grant Date Fair Value Per Share
Granted (in dollars per share)	$ 2.74	$ 3.68	$ 4.57
Performance Stock Units
Total Number of Shares Underlying
Unvested at the beginning of the year (in shares)		63,000	10,000
Granted (in shares)	419,000	0	53,000
Vested (in shares)	0	(10,000)	0
Cancelled/Forfeited (in shares)		(53,000)
Unvested at the end of the year (in shares)	419,000		63,000
Market Stock Units
Total Number of Shares Underlying
Unvested at the beginning of the year (in shares)	641,000	1,397,000	1,333,000
Granted (in shares)	0	0	654,000
Vested (in shares)	0	0	0
Cancelled/Forfeited (in shares)	(470,000)	(756,000)	(590,000)
Unvested at the end of the year (in shares)	171,000	641,000	1,397,000
Weighted Average Grant Date Fair Value Per Share
Granted (in dollars per share)			$ 4.11
Restricted Stock Units, Performance Stock Units and Market Stock Units
Total Number of Shares Underlying
Unvested at the beginning of the year (in shares)	3,725,000	5,160,000	5,227,000
Granted (in shares)	2,428,000	1,386,000	2,236,000
Vested (in shares)	(1,579,000)	(1,491,000)	(1,167,000)
Cancelled/Forfeited (in shares)	(813,000)	(1,330,000)	(1,136,000)
Unvested at the end of the year (in shares)	3,761,000	3,725,000	5,160,000
Weighted Average Grant Date Fair Value Per Share
Unvested at the beginning of the year (in dollars per share)	$ 4.34	$ 5.03	$ 5.75
Granted (in dollars per share)	2.74	3.68	4.40
Vested (in dollars per share)	4.62	5.44	6.24
Cancelled/Forfeited (in dollars per share)	3.96	5.10	5.87
Unvested at the end of the year (in dollars per share)	$ 4.34	$ 4.34	$ 5.03

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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