Stockholders' Equity Common Stock Outstanding Roll Forward (Details) - shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Class of Stock [Line Items] | |||
| Common shares outstanding at beginning of period | 353,906,807 | 366,395,920 | 364,935,168 |
| Stock Issued During Period, Shares, New Issues | 60,602 | 69,826 | 57,218 |
| Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures | 1,704,917 | 1,105,361 | 1,403,534 |
| Stock Repurchased and Retired During Period, Shares | (8,020,000) | (13,664,300) | |
| Common shares outstanding at end of period | 347,652,326 | 353,906,807 | 366,395,920 |
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 2,639,424 | ||
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of shares that have been repurchased and retired during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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