Note 10 - Hedging Activities - Undesignated Hedges (Details) - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021
Gross notional value for translated earning contracts		$ 13,952	$ 13,543
Not Designated as Hedging Instrument [Member]
Gross notional value for translated earning contracts		9,400	8,900
Average Rate Forward Contracts, Japanese Yen-denominated [Member] | Not Designated as Hedging Instrument [Member]
Gross notional value for translated earning contracts		2,400	2,900
Average Rate Forward Contracts, South Korean Won-denominated [Member] | Not Designated as Hedging Instrument [Member]
Gross notional value for translated earning contracts		1,600	1,200
Average Rate Forward Contracts, Euro-denominated [Member] | Not Designated as Hedging Instrument [Member]
Gross notional value for translated earning contracts		100	200
Average Rate Forward Contracts, Other Foreign Currencies [Member] | Not Designated as Hedging Instrument [Member]
Gross notional value for translated earning contracts	[1]	100	100
Options Contracts, Japanese Yen-denominated [Member] | Not Designated as Hedging Instrument [Member]
Gross notional value for translated earning contracts	[2]	4,900	3,600
Options Contracts, Other Foreign Currencies [Member] | Not Designated as Hedging Instrument [Member]
Gross notional value for translated earning contracts	[3]	$ 300	$ 900

[1] Denominational currencies for average rate forward contracts include the Chinese yuan and British pound.

[2] Japanese yen-denominated option contracts include zero-cost collars, purchased put and call options. With respect to the zero-cost collars, the gross notional amount includes the value of the put and call options. However, due to the nature of the zero-cost collars, only the put or call option can be exercised at maturity.

[3] Other foreign currency option contracts are purchased basket options that include a basket of underlying currencies, including the Japanese yen, South Korean won, Chinese yuan, euro and British pound, and each basket option will be settled against U.S. dollars.