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CONSOLIDATED STATEMENT OF SHAREHOLDERS EQUITY (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]        
Tax effect of gain (losses) on derivatives qualifying as hedges $ 0 $ 0 $ 1 $ 0
Tax effect of pension liability and postretirement adjustment $ (2) $ (1) $ (1) $ (2)
Cash dividends declared, per share $ 0.77 $ 0.75 $ 1.54 $ 1.50