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Investing Receivables (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Investing receivables (net of allowance for credit losses of $2,794 and $1,599, respectively) |
Investing Receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Notes receivable, fair value disclosure | $ 87.0 | $ 84.0
Notes receivable from the City of Huntsville | LW Redstone Company, LLC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Interest rate | 9.95% |
Notes receivable, maximum initial maturity term | 30 years |
Other investing loans receivable | Minimum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Interest rate | 8.00% |
Other investing loans receivable | Maximum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Interest rate | 14.00% |
Investing Receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accrued interest receivable, net of allowance for credit losses | $ 2.9 | $ 5.3
Investing Receivables | Other investing loans receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other investing loans receivable, remaining term | 1 year |

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