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Changes in Equity and Noncontrolling Interests (Details) (USD $) In Thousands, except Share data in Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | $ 2,880,072 | $ 2,442,182
Balance at beginning of period |  |  | (54,951) |
Net income | 176,417 | 154,868 | 336,219 | 308,481
Other comprehensive income |  |  | 2,484 | (34,646)
Payments to shareholders of noncontrolling interest |  |  | (1,729) | (1,736)
Purchase of noncontrolling interest |  |  | (8) |
Purchase of treasury stock |  |  | (250,159) | (181,108)
Stock options exercised, including tax benefit |  |  | 75,249 | 80,380
Dividends declared | (31,370) | (16,713) | (62,788) | (33,468)
Stock-based compensation expense |  |  | 19,249 | 17,175
Balance at end of period | 2,998,589 | 2,597,260 | 2,998,589 | 2,597,260
Balance at end of period | (52,105) |  | (52,105) |
Common Stock |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period (in shares) |  |  | 158 | 160
Balance at beginning of period |  |  | 158 | 160
Retirement of treasury stock |  |  | (3) | (2)
Retirement of treasury stock (in shares) |  |  | (3) | (2)
Stock options exercised, including tax benefit |  |  | 2 | 2
Stock options exercised, including tax benefit (in shares) |  |  | 2 | 2
Balance at end of period (in shares) | 157 | 160 | 157 | 160
Balance at end of period | 157 | 160 | 157 | 160
Additional Paid-In Capital |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | 489,930 | 336,683
Stock options exercised, including tax benefit |  |  | 75,247 | 80,378
Stock-based compensation expense |  |  | 19,249 | 17,175
Balance at end of period | 584,426 | 434,236 | 584,426 | 434,236
Retained Earnings |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | 2,424,372 | 2,210,120
Net income |  |  | 333,415 | 306,995
Retirement of treasury stock |  |  | (250,156) | (181,106)
Dividends declared |  |  | (62,788) | (33,468)
Balance at end of period | 2,444,843 | 2,302,541 | 2,444,843 | 2,302,541
Accumulated Other Comprehensive Loss |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | (54,951) | (117,004)
Other comprehensive income |  |  | 2,846 | (34,794)
Balance at end of period | (52,105) | (151,798) | (52,105) | (151,798)
Treasury Stock |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Purchase of treasury stock |  |  | (250,159) | (181,108)
Retirement of treasury stock |  |  | 250,159 | 181,108
Noncontrolling Interests |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | 20,563 | 12,223
Net income |  |  | 2,804 | 1,486
Other comprehensive income |  |  | (362) | 148
Payments to shareholders of noncontrolling interest |  |  | (1,729) | (1,736)
Purchase of noncontrolling interest |  |  | (8) |
Balance at end of period | $ 21,268 | $ 12,121 | $ 21,268 | $ 12,121

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