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Condensed Consolidated Statements Of Financial Position (Current period Unaudited) (Parentheticals) - $ / shares
Mar. 31, 2022
Dec. 31, 2021
Common shares, par value (in dollars per share) $ 2.50 $ 2.50
Common stock, authorized (in shares) 1,400,000,000 1,400,000,000
Common shares issued (in shares) 1,112,643,596 1,112,440,400
Common shares outstanding (in shares) 628,202,430 638,841,656