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Statements of Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Amortized Cost $ 164.6 $ 163.9
Allowance for Credit Loss $ 0.2 $ 0.5
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares Authorized 600,000,000 600,000,000
Common Stock, Shares, Outstanding 392,628,625 391,760,051
Preferred Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 20,000,000 20,000,000
Preferred Stock, Shares Outstanding 1,302,500 440,000