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Basis of Presentation and Significant Accounting Policies (Narratives) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2025
Aug. 31, 2024
Nov. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]          
Cash equivalents $ 164.7   $ 164.7   $ 385.1
Other comprehensive income (loss) $ 109.8 $ 157.3 $ 327.3 $ 464.4