Note 12 - Shareholders' Equity- Summary of Changes in Foreign Currency Translation Adjustment Component of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Balance		$ 12,545	$ 13,448
Net current-period other comprehensive loss		(187)	(352)
Balance		12,629	13,558
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	[1]	(933)	(329)
Losses on foreign currency translation (2)	[1],[2]	(198)	(355)
Equity method affiliates	[1],[3]	(2)	(8)
Net current-period other comprehensive loss	[1]	(200)	(363)
Balance	[1]	$ (1,133)	$ (692)

[1] All amounts are after tax. Amounts in parentheses indicate debits to accumulated other comprehensive loss.

[2] For the three months ended March 31, 2022 and 2021, amounts are net of tax benefit of $11 million and $10 million, respectively.

[3] Tax effects are not significant.