The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The cash outflow to reacquire preferred stock originally issued and identified as a security that can be exchanged for another type of financial security. This repurchased stock is held in treasury.

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The percentage rate used to calculate dividend payments on preferred stock.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Number of new stock issued during the period.

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Accretion of temporary equity during the period due to cash, stock, and in-kind dividends. This item is an adjustment to net income necessary to derive net income apportioned to common stockholders and is to be distinguished from Temporary Equity, Accretion of Dividends (Temporary Equity, Accretion of Dividends).

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8.00% Series A Convertible Preferred Stock - Narrative (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 19, 2021	Jan. 15, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Temporary Equity [Line Items]
Cash paid, stock conversion (not to exceed)					$ 105.0	$ 0.0
Dividends			$ 0.0	$ 5.6	$ 592.3	$ 16.6
TCP-ASC ACHI Series LLLP
Temporary Equity [Line Items]
Cash paid, stock conversion (not to exceed)		$ 105.0
Dividends	$ 592.3
Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Number of shares converted (in shares)					294,266
Preferred stock, dividend rate (percentage)					8.00%		8.00%
Redeemable Convertible Preferred Stock \| TCP-ASC ACHI Series LLLP
Temporary Equity [Line Items]
Number of shares converted (in shares)		294,266
Preferred stock, dividend rate (percentage)	8.00%
Common Stock \| TCP-ASC ACHI Series LLLP
Temporary Equity [Line Items]
Number of shares issued in stock conversion (in shares)		117,706,400
Additional shares issued (in shares)		21,582,800