Capital Stock	12 Months Ended
Dec. 31, 2020
Capital Stock [Abstract]
Capital Stock	(13) Capital Stock: As of December 31, 2020, Frontier has approximately 175 million, 106 million, and 105 million shares of common stock authorized, issued, and outstanding, respectively. Additionally, Frontier has no shares of preferred stock issued and outstanding as of December 31, 2020 or 2019. Mandatory Convertible Preferred Stock (Series A) On June 29, 2018, all outstanding shares of Frontier’s 11.125% Mandatory Convertible Preferred Stock, Series A, par value $0.01 per share (the Series A Preferred Stock) converted at a rate of 1.3333 common shares per share of preferred stock into an aggregate of approximately 25,529,000 shares (net of fractional shares) of the Company’s common stock, pursuant to the terms of the Certificate of Designation governing the Series A Preferred Stock. Frontier issued cash in lieu of fractional shares of common stock in the conversion. These payments were recorded as a reduction to Additional paid-in capital. The final dividend of $54 million was paid on July 2, 2018. The Series A Preferred Stock was issued in June 2015 when we completed a registered offering of 19.25 million preferred shares at an offering price of $100 per share. Aggregate net proceeds of the offering were $1,866 million after deducting commissions and estimated expenses. We used the net proceeds from this offering to fund a portion of the acquisition price of the CTF Acquisition and related fees and expenses.

Capital Stock

12 Months Ended

Dec. 31, 2020

(13) Capital Stock:

As of December 31, 2020, Frontier has approximately 175 million, 106 million, and 105 million shares of common stock authorized, issued, and outstanding, respectively. Additionally, Frontier has no shares of preferred stock issued and outstanding as of December 31, 2020 or 2019.

Mandatory Convertible Preferred Stock (Series A)

On June 29, 2018, all outstanding shares of Frontier’s 11.125% Mandatory Convertible Preferred Stock, Series A, par value $0.01 per share (the Series A Preferred Stock) converted at a rate of 1.3333 common shares per share of preferred stock into an aggregate of approximately 25,529,000 shares (net of fractional shares) of the Company’s common stock, pursuant to the terms of the Certificate of Designation governing the Series A Preferred Stock. Frontier issued cash in lieu of fractional shares of common stock in the conversion. These payments were recorded as a reduction to Additional paid-in capital. The final dividend of $54 million was paid on July 2, 2018.

The Series A Preferred Stock was issued in June 2015 when we completed a registered offering of 19.25 million preferred shares at an offering price of $100 per share. Aggregate net proceeds of the offering were $1,866 million after deducting commissions and estimated expenses. We used the net proceeds from this offering to fund a portion of the acquisition price of the CTF Acquisition and related fees and expenses.