Note 8 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended				12 Months Ended
	Dec. 17, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Preferred Stock, Shares Authorized (in shares)		50,000,000				50,000,000	50,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01				$ 0.01	$ 0.01
Preferred Stock, Shares Outstanding, Ending Balance (in shares)		0				0	0
Common Stock, Shares Authorized (in shares)		450,000,000				450,000,000	450,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01				$ 0.01	$ 0.01
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.10	$ 0.01	$ 0.01	$ 0.01	$ 0.40	$ 0.40	$ 0.10
Common Stock, Shares, Issued (in shares)		143,366,482				143,366,482
Common Stock, Shares, Outstanding, Ending Balance (in shares)		143,366,482				143,366,482	144,238,660
Treasury Stock, Shares, Total (in shares)		0				0	11,661,591
Payments of Ordinary Dividends, Common Stock						$ 58	$ 58	$ 15
Treasury Stock, Shares, Retired (in shares)	13,477,933
Treasury Stock, Retired, Value						(0)
Treasury Stock, Value, Acquired, Cost Method					$ 25	25	$ 23
Treasury Stock, Shares, Acquired (in shares)					1,483,742
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 102				$ 102
Additional Paid-in Capital [Member]
Treasury Stock, Retired, Value	$ 216