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Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member] | Total Stockholders' Equity [Member] | Non-controlling Interests [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 | $ 1 | $ 718 | $ (3) | $ 145 | $ 2 | $ 863 | $ 4,481 | $ 5,344
Common stock, shares issued at Dec. 31, 2015 | 64,121,150 |  |  |  |  |  |  |
Common Stock distributed pursuant to stock incentive plans (in shares) | 2,395,210 |  |  |  |  |  |  |
Compensation for stock grants vesting in the future |  | 3 |  |  |  | 3 | 19 | 22
Repurchase of common stock for employee tax withholding under stock incentive plans |  |  | (26) |  |  | (26) |  | (26)
Dividends paid to stockholders |  |  |  | (13) |  | (13) |  | (13)
Distributions from IBG LLC to noncontrolling interests |  |  |  |  |  |  | (165) | (165)
Adjustments for changes in proportionate ownership in IBG LLC |  | 25 |  |  |  | 25 | (25) |
Comprehensive Income |  |  |  | 60 | 3 | 63 | 467 | 530
Balance at Jun. 30, 2016 | $ 1 | 746 | (29) | 192 | 5 | 915 | 4,777 | 5,692
Common stock, shares issued at Jun. 30, 2016 | 66,516,360 |  |  |  |  |  |  |
Balance at Dec. 31, 2016 | $ 1 | 775 | (3) | 203 | (2) | 974 | 4,846 | 5,820
Common stock, shares issued at Dec. 31, 2016 | 68,119,412 |  |  |  |  |  |  |
Common Stock distributed pursuant to stock incentive plans (in shares) | 2,265,002 |  |  |  |  |  |  |
Compensation for stock grants vesting in the future |  | 4 |  |  |  | 4 | 21 | 25
Repurchase of common stock for employee tax withholding under stock incentive plans |  |  | (21) |  |  | (21) |  | (21)
Sales of treasury stock |  |  | 21 |  |  | 21 |  | 21
Dividends paid to stockholders |  |  |  | (14) |  | (14) |  | (14)
Distributions from IBG LLC to noncontrolling interests |  |  |  |  |  |  | (82) | (82)
Adjustments for changes in proportionate ownership in IBG LLC |  | 28 |  |  |  | 28 | (28) |
Comprehensive Income |  |  |  | 47 | 10 | 57 | 385 | 442
Balance at Jun. 30, 2017 | $ 1 | $ 807 | $ (3) | $ 236 | $ 8 | $ 1,049 | $ 5,142 | $ 6,191
Common stock, shares issued at Jun. 30, 2017 | 70,384,414 |  |  |  |  |  |  |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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