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Consolidated Statements of Changes in Stockholders' Equity (USD $) In Millions | Total | Common Stock | Treasury Stock | Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2010 | $ 1,189 | $ 2 | $ (399) | $ 690 | $ 884 | $ 12
Beginning Balance (in shares) at Dec. 31, 2010 |  | 185 | (17) |  |  |
Net income | 353 |  |  |  | 353 |
Employee stock compensation, employee stock purchase programs and option exercises (in shares) |  | 2 |  |  |  |
Employee stock compensation, employee stock purchase programs and option exercises | 60 |  |  | 60 |  |
Income tax benefit from stock compensation plans | 15 |  |  | 15 |  |
Purchases of treasury stock, not retired (in shares) |  |  | (2) |  |  |
Purchases of treasury stock, not retired | (127) |  | (127) |  |  |
Pension and postemployment benefit plans, net of tax | 10 |  |  |  |  | 10
Currency translation adjustment | (6) |  |  |  |  | (6)
Ending Balance at Dec. 31, 2011 | 1,494 | 2 | (526) | 765 | 1,237 | 16
Ending Balance (in shares) at Dec. 31, 2011 |  | 187 | (19) |  |  |
Net income | 419 |  |  |  | 419 |
Employee stock compensation, employee stock purchase programs and option exercises (in shares) |  | 3 |  |  |  |
Employee stock compensation, employee stock purchase programs and option exercises | 95 |  |  | 95 |  |
Income tax benefit from stock compensation plans | 38 |  |  | 38 |  |
Purchases of treasury stock, not retired (in shares) |  |  | (5) |  |  |
Purchases of treasury stock, not retired | (280) |  | (280) |  |  |
Pension and postemployment benefit plans, net of tax | 4 |  |  |  |  | 4
Currency translation adjustment | 9 |  |  |  |  | 9
Ending Balance at Dec. 31, 2012 | 1,779 | 2 | (806) | 898 | 1,656 | 29
Ending Balance (in shares) at Dec. 31, 2012 |  | 190 | (24) |  |  |
Net income | 377 |  |  |  | 377 |
Employee stock compensation, employee stock purchase programs and option exercises (in shares) |  | 1 |  |  |  |
Employee stock compensation, employee stock purchase programs and option exercises | 68 |  |  | 68 |  |
Income tax benefit from stock compensation plans | 7 |  |  | 7 |  |
Purchases of treasury stock, not retired (in shares) |  |  | (8) |  |  |
Purchases of treasury stock, not retired | (378) |  | (378) |  |  |
Pension and postemployment benefit plans, net of tax | 2 |  |  |  |  | 2
Currency translation adjustment | 2 |  |  |  |  | 2
Ending Balance at Dec. 31, 2013 | $ 1,857 | $ 2 | $ (1,184) | $ 973 | $ 2,033 | $ 33
Ending Balance (in shares) at Dec. 31, 2013 |  | 191 | (32) |  |  |

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