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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | $ 2,442,182 | $ 2,184,786
Balance at beginning of period |  |  | (117,004) |
Net income | 161,389 | 148,800 | 469,870 | 417,941
Other comprehensive income | 31,256 | 20,777 | (3,390) | 7,167
Payments to shareholders of noncontrolling interest |  |  | (4,371) | (4,713)
Purchase of noncontrolling interest | 288 |  | 288 |
Purchase of treasury stock |  |  | (296,975) | (229,442)
Stock options exercised, including tax benefit |  |  | 98,009 | 90,217
Dividends declared | (31,629) | (16,964) | (65,101) | (50,905)
Stock-based compensation expense |  |  | 26,584 | 23,167
Balance at end of period | 2,666,520 | 2,438,218 | 2,666,520 | 2,438,218
Balance at end of period | (120,686) |  | (120,686) |
Common Stock |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period (in shares) |  |  | 160 | 163
Balance at beginning of period |  |  | 160 | 163
Retirement of treasury stock |  |  | (4) | (4)
Retirement of treasury stock (in shares) |  |  | (4) | (4)
Stock options exercised, including tax benefit |  |  | 2 | 3
Stock options exercised, including tax benefit (in shares) |  |  | 2 | 3
Balance at end of period (in shares) | 158 | 162 | 158 | 162
Balance at end of period | 158 | 162 | 158 | 162
Additional Paid-in Capital |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | 336,683 | 189,166
Purchase of noncontrolling interest |  |  | 662 |
Stock options exercised, including tax benefit |  |  | 98,007 | 90,214
Stock-based compensation expense |  |  | 26,584 | 23,167
Balance at end of period | 461,936 | 302,547 | 461,936 | 302,547
Accumulated Earnings |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | 2,210,120 | 2,102,497
Net income |  |  | 467,793 | 414,955
Retirement of treasury stock |  |  | (296,971) | (229,438)
Dividends declared |  |  | (65,101) | (50,905)
Balance at end of period | 2,315,841 | 2,237,109 | 2,315,841 | 2,237,109
Accum. Other Comprehensive Loss |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | (117,004) | (120,057)
Other comprehensive income |  |  | (3,970) | 7,080
Purchase of noncontrolling interest |  |  | 288 |
Balance at end of period | (120,686) | (112,977) | (120,686) | (112,977)
Treasury Stock |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Purchase of treasury stock |  |  | (296,975) | (229,442)
Retirement of treasury stock |  |  | (296,975) | (229,442)
Noncontrolling Interests |  |  |  |
Increase (Decrease) In Shareholders' Equity |  |  |  |
Balance at beginning of period |  |  | 12,223 | 13,017
Net income |  |  | 2,077 | 2,986
Other comprehensive income |  |  | 292 | 87
Payments to shareholders of noncontrolling interest |  |  | (4,371) | (4,713)
Purchase of noncontrolling interest |  |  | (950) |
Balance at end of period | $ 9,271 | $ 11,377 | $ 9,271 | $ 11,377

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