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Equity Equity (Policies)	3 Months Ended
Equity Equity (Policies)	Mar. 31, 2019
Equity [Abstract]
Stock Repurchase Policy [Policy Text Block]	Stock Repurchases The Company may repurchase shares of its common stock under authorizations from its Board of Directors. Shares repurchased are retired and not displayed separately as treasury stock on the consolidated financial statements. The par value of the shares repurchased and retired is deducted from common stock and the excess of the purchase price over par value is first charged against any available additional paid-in capital with the balance charged to retained earnings. Direct costs incurred to repurchase the shares are included in the total cost of the shares. The Company's Board of Directors authorized a share repurchase program of up to $275 million, $300 million, $350 million and $175 million of the Company's common stock in February 2016, 2017, 2018 and 2019, respectively. In the first quarter of 2019, the Company repurchased and retired 1.2 million shares of common stock for $20 million at a weighted average market price of $17.21 per share. As of March 31, 2019, the Company had repurchased and retired 35.5 million shares of common stock for an aggregate of $896 million at a total weighted average market price of $25.22 per share. As of March 31, 2019, $204 million remained available for repurchase under the share repurchase programs.
Dividends Policy [Policy Text Block]	Dividend Policy In August 2016, the Company’s Board of Directors approved the initiation of a quarterly cash dividend policy of $0.09 per share on its common stock. The Board declared and paid a quarterly cash dividend of $0.09 per share on the Company’s common stock during the first quarter of 2019. The declaration and payment of any future dividend will be subject to the discretion of the Board of Directors and will depend on a variety of factors, including the Company’s financial condition and results of operations, contractual restrictions, including restrictive covenants contained in the Company’s credit agreements, and the indentures governing the Company’s outstanding debt securities, capital requirements and other factors that the Board of Directors deems relevant. The restrictive covenants in the indenture governing the 9.375% Senior Notes restrict the Company's ability to declare dividends in excess of $45 million per year. See Note 5. "Short and Long-Term Debt—Unsecured Notes" for additional information. Pursuant to the Company’s policy, dividends payable in cash are treated as a reduction of additional paid-in capital since the Company is currently in an accumulated deficit position.