Capital Stock	12 Months Ended
Dec. 31, 2016
Capital Stock [Abstract]
Capital Stock	(10)Capital Stock: We are authorized to issue up to 1,750,000,000 shares of common stock and 50,000,000 shares of preferred stock. The amount and timing of dividends payable on common and preferred stock are, subject to applicable law, within the sole discretion of our Board of Directors. Common Stock Offering On June 10, 2015, we completed a registered offering of 150,000,000 shares of our common stock, par value $0.25 per share, at an offering price of $5 per share. On June 24, 2015, Frontier issued an additional 15,000,000 shares of common stock in connection with the over-allotment option that was exercised in full by the underwriters. Aggregate net proceeds were approximately $799 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. Mandatory Convertible Preferred Stock (Series A) Offering On June 10, 2015, we also completed a registered offering of 17,500,000 shares of our 11.125% Mandatory Convertible Preferred Stock, Series A, par value $0.01 per share (the “Series A Preferred Stock”), at an offering price of $100 per share. On June 24, 2015, Frontier issued an additional 1,750,000 shares of Series A Preferred Stock in connection with the over-allotment option that was exercised in full by the underwriters. 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. Unless converted earlier, each share of the Series A Preferred Stock will automatically convert on June 29, 2018 into common stock, (between 17.0213 and 20.0000 shares) depending on the applicable market value of our common stock, subject to anti-dilution adjustments. Subject to certain restrictions, at any time prior to June 29, 2018, holders of the Series A Preferred Stock may elect to convert all or a portion of their shares into common stock at the minimum conversion rate then in effect. Dividends on shares of the Series A Preferred Stock are payable on a cumulative basis when, as and if declared by our Board of Directors (or an authorized committee thereof) at an annual rate of 11.125% on the liquidation preference of $100.00 per share, on the last business day of March, June, September and December of each year, commencing on September 30, 2015 to, and including, the mandatory conversion date. Series A Preferred Stock dividends of $214 million and $120 million were paid in 2016 and 2015, respectively. Pursuant to the terms of the CTF Acquisition, $1,955 million of the $2,665 million in net proceeds from the equity offerings were deposited into escrow and were included in “Restricted cash” in the consolidated balance sheet as of December 31, 2015. Upon closing of the CTF Acquisition, the funds were released and used to fund a portion of the purchase price.

Capital Stock

12 Months Ended

Dec. 31, 2016

(10)Capital Stock:

We are authorized to issue up to 1,750,000,000 shares of common stock and 50,000,000 shares of preferred stock. The amount and timing of dividends payable on common and preferred stock are, subject to applicable law, within the sole discretion of our Board of Directors.

Common Stock Offering

On June 10, 2015, we completed a registered offering of 150,000,000 shares of our common stock, par value $0.25 per share, at an offering price of $5 per share. On June 24, 2015, Frontier issued an additional 15,000,000 shares of common stock in connection with the over-allotment option that was exercised in full by the underwriters. Aggregate net proceeds were approximately $799 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.

Mandatory Convertible Preferred Stock (Series A) Offering

On June 10, 2015, we also completed a registered offering of 17,500,000 shares of our 11.125% Mandatory Convertible Preferred Stock, Series A, par value $0.01 per share (the “Series A Preferred Stock”), at an offering price of $100 per share. On June 24, 2015, Frontier issued an additional 1,750,000 shares of Series A Preferred Stock in connection with the over-allotment option that was exercised in full by the underwriters. 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.

Unless converted earlier, each share of the Series A Preferred Stock will automatically convert on June 29, 2018 into common stock, (between 17.0213 and 20.0000 shares) depending on the applicable market value of our common stock, subject to anti-dilution adjustments. Subject to certain restrictions, at any time prior to June 29, 2018, holders of the Series A Preferred Stock may elect to convert all or a portion of their shares into common stock at the minimum conversion rate then in effect.

Dividends on shares of the Series A Preferred Stock are payable on a cumulative basis when, as and if declared by our Board of Directors (or an authorized committee thereof) at an annual rate of 11.125% on the liquidation preference of $100.00 per share, on the last business day of March, June, September and December of each year, commencing on September 30, 2015 to, and including, the mandatory conversion date. Series A Preferred Stock dividends of $214 million and $120 million were paid in 2016 and 2015, respectively.

Pursuant to the terms of the CTF Acquisition, $1,955 million of the $2,665 million in net proceeds from the equity offerings were deposited into escrow and were included in “Restricted cash” in the consolidated balance sheet as of December 31, 2015. Upon closing of the CTF Acquisition, the funds were released and used to fund a portion of the purchase price.