Note 6 - Stockholders' Equity - Changes In Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Balance	$ 899	$ 1,396
Net income (loss)	1,091	30
Other comprehensive income (loss)	176	32
Common stock dividends and dividend equivalents	(14)	(15)
Common stock share repurchases	(126)
Distributions to noncontrolling interests	(1)	(1)
Sale of noncontrolling interests	(3)
Stock compensation	9	12
Stock withheld for employee taxes	(17)	(8)
Balance	2,014	1,446
Common Stock [Member]
Balance	1	2
Balance	1	2
Additional Paid-in Capital [Member]
Balance	1,671	2,282
Common stock share repurchases	(126)
Stock compensation	9	12
Balance	1,554	2,294
Retained Earnings [Member]
Balance	235	204
Net income (loss)	1,087	25
Common stock dividends and dividend equivalents	(14)	(15)
Balance	1,308	214
Treasury Stock, Common [Member]
Balance	(35)	(13)
Stock withheld for employee taxes	(17)	(8)
Balance	(52)	(21)
AOCI Attributable to Parent [Member]
Balance	(1,032)	(1,142)
Other comprehensive income (loss)	176	32
Balance	(856)	(1,110)
Noncontrolling Interest [Member]
Balance	59	63
Net income (loss)	4	5
Distributions to noncontrolling interests	(1)	(1)
Sale of noncontrolling interests	(3)
Balance	$ 59	$ 67