Note 14 - Shareholders' Equity (Details Textual) - USD ($) $ in Millions		3 Months Ended				6 Months Ended			12 Months Ended		24 Months Ended
	Apr. 08, 2021	Jun. 30, 2021		Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020	Apr. 08, 2023	Apr. 08, 2022	Apr. 08, 2023	Jan. 16, 2021	Dec. 31, 2020	Jul. 17, 2019	Apr. 26, 2018
Payments for Repurchase of Common Stock						$ 1.0		$ 105.0
Preferred Stock Redemption Premium		$ 803.0	[1]			803.0	[1]
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Other Comprehensive Income (Loss), Tax, Total		$ (1.0)			$ 5.0	$ (11.0)		$ (17.0)
Share Repurchase Agreement [Member] | Samsung [Member]
Stock Repurchased and Retired During Period, Shares (in shares)	35,000,000					35,000,000
Payments for Repurchase of Common Stock	$ 507.0
Stock Repurchased and Retired During Period, Value	1,500.0
Preferred Stock Redemption Premium	$ 803.0
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares)	22,000,000
Share Repurchase Agreement, Make-whole payment, Cap, Percentage	5.00%
Liabilities for Freestanding Written Put Option	$ 21.0
Number of Shares Held by Counter Party subject to Seven Year Lock-up Period (in shares)	58,000,000
Share Repurchase Agreement [Member] | Samsung [Member] | Forecast [Member]
Payments for Repurchase of Common Stock									$ 507.0	$ 507.0	$ 1,500.0
The 2018 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount															$ 2,000.0
Treasury Stock, Shares, Acquired (in shares)					0			4,100,000
Treasury Stock, Value, Acquired, Cost Method								$ 105.0
The 2019 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount														$ 5,000.0
Treasury Stock, Shares, Acquired (in shares)						39,000
Treasury Stock, Value, Acquired, Cost Method						$ 1.5
The 2019 and 2019 Repurchase Programs [Member]
Treasury Stock, Shares, Acquired (in shares)		35,000,000		0
Conversion of Preferred Stock into Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)	115,000,000
Series A Convertible Preferred Stock [Member]
Preferred Stock, Shares Outstanding, Ending Balance (in shares)													2,300
Preferred Stock, Convertible, Shares Issuable (in shares)												115,000,000
Converted from Preferred Stock [Member]
Common Stock, Shares, Outstanding, Ending Balance (in shares)	80,000,000	80,000,000				80,000,000

[1] Refer to Note 6 ((Loss) Earnings per Share) and Note 14 (Shareholders' Equity) to the consolidated financial statements for additional information.