Note 21 - Changes in Benefit Obligations Recognized in Other Comprehensive Loss (Income) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Amortization of:
Total gain recognized in Other comprehensive (loss) income	$ 12	$ 9
Other Postretirement Benefits Plan [Member]
Changes In Benefit Obligations Recognized In Other Comprehensive Loss Income [Line Items]
Newly established loss (gain)		(6)
Amortization of:
Net actuarial gain	1
Total gain recognized in Other comprehensive (loss) income	$ 1	$ (6)

Amortization of.

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- Definition

Changes in benefit obligations recognized in other comprehensive loss income.

+ References

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

+ References

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Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

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- Definition

Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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