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Consolidated Statements of Shareholders' Investment (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Class A Non-Voting
Class Of Stock [Line Items]
Cash dividends paid (in dollars per share)	$ 0.26	$ 0.24	$ 0.24
Class B Voting
Class Of Stock [Line Items]
Cash dividends paid (in dollars per share)	$ 0.26	$ 0.24	$ 0.24

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