Operating and Reporting Segments (Narrative) (Details) shares in Thousands	3 Months Ended
Feb. 28, 2021 USD ($) earnout shares	Feb. 29, 2020 USD ($)
Disposal Group, Held-for-sale, Not Discontinued Operations \| Sunnova Energy International Inc.
Segment Reporting Information [Line Items]
Number of shares to be received (in shares) \| shares	7,220
Number of shares to be received upon closing (in shares) \| shares	3,330
Number of earnout agreements \| earnout	2
Financial Services \| Warehouse Repurchase Facility
Segment Reporting Information [Line Items]
Collateral percentage	80.00%
Lennar Other
Segment Reporting Information [Line Items]
Lennar Other unrealized gain \| $	$ 469,700,000
CMBS \| Financial Services
Segment Reporting Information [Line Items]
Impairment charges for CMBS securities \| $	$ 0	$ 0

Disposal Group, Including Discontinued Operation, Consideration, Equity Interest Received at Closing, Number of Shares

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Disposal Group, Including Discontinued Operation, Consideration, Equity Interest Received, Number of Shares

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Amount, before tax, of other-than-temporary impairment (OTTI) on investment in debt security measured at amortized cost (held-to-maturity), recognized in earnings and other comprehensive income (OCI).

+ References

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-Topic 320
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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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