Note 14 - Shareholders' Equity (Details Textual) - USD ($) $ in Millions			3 Months Ended			9 Months Ended		12 Months Ended		24 Months Ended
		Apr. 08, 2021	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 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						$ 22	$ 105
Preferred Stock Redemption Premium	[1]					803
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Other Comprehensive Income (Loss), Tax, Total			$ 31		$ 21	$ 42	$ 10
Share Repurchase Agreement [Member] | Samsung [Member]
Stock Repurchased and Retired During Period, Shares (in shares)		35,000,000
Payments for Repurchase of Common Stock		$ 507
Stock Repurchased and Retired During Period, Value				$ 1,500
Preferred Stock Redemption Premium		$ 803
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		$ 17
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	$ 507	$ 1,500
The 2018 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount														$ 2,000
Treasury Stock, Shares, Acquired (in shares)					0		4,100,000
Treasury Stock, Value, Acquired, Cost Method							$ 105
The 2019 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount													$ 5,000
Treasury Stock, Shares, Acquired (in shares)			629,000			668,000
Treasury Stock, Value, Acquired, Cost Method			$ 24			$ 25
The 2018 and 2019 Repurchase Programs [Member]
Treasury Stock, Shares, Acquired (in shares)				35,000,000
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

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