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Debt - Senior Debentures (Details) - 6.70% Senior debentures due 2034 - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2020
Dec. 31, 2015
Debt Instrument [Line Items]      
Interest rate, stated percentage 6.70%   6.70%
Debt acquired in an acquisition     $ 300
Annual effective interest rate   10.96%