Note 14 - Shareholders' Equity (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jul. 17, 2019	Apr. 26, 2018
Treasury Stock, Shares, Acquired (in shares)	0
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Other Comprehensive Income (Loss), Tax, Total	$ 10	$ 29
The 2018 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount				$ 2,000
Treasury Stock, Shares, Acquired (in shares)		4,100,000
Treasury Stock, Value, Acquired, Cost Method		$ 105
The 2019 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount			$ 5,000
Series A Convertible Preferred Stock [Member]
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	2,300
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)	50,000