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Marketable Investment Securities - Narrative (Details) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2022 USD ($) position	Dec. 31, 2021 USD ($) position	Jun. 30, 2020 USD ($)
Investments, Debt and Equity Securities [Abstract]
Investment sold	$ 1.6	$ 28.4	$ 8.3	$ 3.4
Debt securities, available-for-sale, in unrealized loss position | position		118	100
Debt securities, available-for-sale, unrealized loss position, accumulated loss		$ (2.7)	$ (0.2)
Available-for-sale securities, gross unrealized loss, fair market value		$ 111.6	$ 77.7

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

+ References

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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