Stockholder's Equity (Details)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Preferred Stock:
Authorized shares	50,000,000us-gaap_PreferredStockSharesAuthorized	50,000,000us-gaap_PreferredStockSharesAuthorized
Issued shares	25,875,000us-gaap_PreferredStockSharesIssued	25,875,000us-gaap_PreferredStockSharesIssued
Outstanding shares	25,875,000us-gaap_PreferredStockSharesOutstanding	25,875,000us-gaap_PreferredStockSharesOutstanding	25,875,000us-gaap_PreferredStockSharesOutstanding	26,108,236us-gaap_PreferredStockSharesOutstanding
Common Stock, $1.00 par value:
Authorized shares	700,000,000us-gaap_CommonStockSharesAuthorized	700,000,000us-gaap_CommonStockSharesAuthorized
Issued shares	351,237,849us-gaap_CommonStockSharesIssued	329,487,615us-gaap_CommonStockSharesIssued
Outstanding shares	350,471,798us-gaap_CommonStockSharesOutstanding	328,790,066us-gaap_CommonStockSharesOutstanding

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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