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Note 9 - Redeemable Noncontrolling Interests - Reconciliation of Changes in Redeemable Noncontrolling Interests (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Balance, beginning of period $ 180 $ 167
Capital contribution from redeemable noncontrolling interest 14 4
Sale of redeemable noncontrolling interest   7
Adjustment to redemption value 6 38
Other (1)  
Net loss attributable to redeemable noncontrolling interests (11) (30)
Other comprehensive income (loss) attributable to redeemable noncontrolling interests 10 (6)
Balance, end of period $ 198 $ 180