Annual report pursuant to Section 13 and 15(d)

Note 24 - Stock-based Compensation Plan (Details Textual)

v3.20.4
Note 24 - Stock-based Compensation Plan (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
May 05, 2016
Share-based Payment Arrangement, Expense, Tax Benefit $ 4 $ 8 $ 18  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 8.25 $ 9.27 $ 15.20  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 9 $ 4 $ 78  
Proceeds from Stock Options Exercised 3 2 17  
Share-based Payment Arrangement, Option [Member]        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 7      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 9 months 18 days      
Share-based Payment Arrangement, Exercise of Option, Tax Benefit $ 2 $ 1 $ 17  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.40% 2.50% 2.60%  
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate 34.00% 34.60% 44.30%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.40% 2.50% 2.30%  
Share Based Compensation Arrangement by Share Based Payment Award, Performance Period (Year) 3 years      
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Target Shares Awards for Grant Number (in shares) 174,200      
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Vested Above Target Number (in shares) 165,489      
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Vested Above Target, Grant Date Fair Value (in dollars per share) $ 26.99      
Restricted Stock Units (RSUs) [Member]        
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Vested Not Issued (in shares) 426,856      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) 37,761      
Nonvested Shares [Member]        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 23      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 9 months 18 days      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 24 $ 24 $ 24  
The 2016 Stock Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) 7,000,000     8,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 3 years      
The 2016 Stock Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 10 years