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Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Of Changes In Equity [Abstract]      
Dividends paid, per share $ 8.42 $ 7.62 $ 5.72
Capital distribution, per share $ 3.03 $ 2.38 $ 3.33