Note 6 - Stockholders' Equity - Changes In Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Balance	$ 1,975	$ 1,834
Net income	21	72
Other comprehensive income (loss)	36	(20)
Common stock dividends and dividend equivalents	(14)	(14)
Common stock share repurchases	(25)
Distributions to noncontrolling interests	(1)
Purchase of noncontrolling interests	(1)
Redeemable noncontrolling interests adjustment to redemption value	(1)	(4)
Stock compensation	4	7
Stock withheld for employees taxes	(7)	(5)
Balance	1,987	1,870
Common Stock [Member]
Balance	2	2
Balance	2	2
Additional Paid-in Capital [Member]
Balance	2,427	2,408
Stock compensation	4	7
Balance	2,431	2,415
Retained Earnings [Member]
Balance	662	530
Net income	17	71
Common stock dividends and dividend equivalents	(14)	(14)
Redeemable noncontrolling interests adjustment to redemption value	(1)	(4)
Balance	664	583
Treasury Stock [Member]
Balance	(184)	(156)
Common stock share repurchases	(25)
Stock withheld for employees taxes	(7)	(5)
Balance	(216)	(161)
AOCI Attributable to Parent [Member]
Balance	(985)	(1,026)
Other comprehensive income (loss)	36	(18)
Balance	(949)	(1,044)
Noncontrolling Interest [Member]
Balance	53	76
Net income	4	1
Other comprehensive income (loss)		(2)
Distributions to noncontrolling interests	(1)
Purchase of noncontrolling interests	(1)
Balance	$ 55	$ 75