Schedule I - Condensed Financial Information of Registrant - Restricted Net Assets (Details) - USD ($) $ in Millions	Nov. 30, 2021	Nov. 30, 2020
Registration Payment Arrangement [Line Items]
Undistributed earnings of unconsolidated subsidiaries	$ 218.3
Parent company
Registration Payment Arrangement [Line Items]
Assets that may be restricted to the payment of cash dividends and advances	6,100.0	$ 6,500.0
Undistributed earnings of unconsolidated subsidiaries	218.3
Parent company | Restricted assets due to regulatory requirements or regulatory approvals
Registration Payment Arrangement [Line Items]
Assets that may be restricted to the payment of cash dividends and advances	$ 5,200.0	$ 5,700.0