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Consolidated Statements of Shareholders' Equity (USD $) In Millions, unless otherwise specified | Total | Common stock: | Additional paid-in capital: | Retained earnings: | Accumulated other comprehensive income (loss): | Treasury stock:
--- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2010 |  | $ 66 | $ 1,320 | $ 13,787 | $ 753 | $ (5,386)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options |  |  | 12 |  |  |
Share-based compensation |  |  | 8 |  |  |
Gain (loss) on treasury stock reissued |  |  | 10 |  |  |
Net earnings | 389 |  |  | 389 |  |
Dividends to shareholders |  |  |  | (141) |  |
Unrealized foreign currency translation gains (losses) during period, net of income taxes: |  |  |  |  |  |
Change in unrealized foreign currency translation gains (losses) during period, net of income taxes |  |  |  |  | (55) |
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments: |  |  |  |  |  |
Change in unrealized gains (losses) on investment securities not other-than-temporarily impaired, net of income taxes |  |  |  |  | (52) |
Change in unrealized gains (losses) on other-than-temporarily impaired investment securities, net of income taxes |  |  |  |  | 3 |
Unrealized gains (losses) on derivatives during period, net of income taxes |  |  |  |  | (36) |
Pension liability adjustment during period, net of income taxes |  |  |  |  | 2 |
Purchases of treasury stock |  |  |  |  |  | (184)
Cost of shares issued |  |  |  |  |  | 14
Balance, end of period at Mar. 31, 2011 | 10,510 | 66 | 1,350 | 14,035 | 615 | (5,556)
Balance, beginning of period at Dec. 31, 2011 | 12,946 | 66 | 1,408 | 15,148 | 1,965 | (5,641)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options |  |  | 13 |  |  |
Share-based compensation |  |  | 5 |  |  |
Gain (loss) on treasury stock reissued |  |  | 7 |  |  |
Net earnings | 785 |  |  | 785 |  |
Dividends to shareholders |  |  |  | (154) |  |
Unrealized foreign currency translation gains (losses) during period, net of income taxes: |  |  |  |  |  |
Change in unrealized foreign currency translation gains (losses) during period, net of income taxes |  |  |  |  | (266) |
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments: |  |  |  |  |  |
Change in unrealized gains (losses) on investment securities not other-than-temporarily impaired, net of income taxes |  |  |  |  | 305 |
Change in unrealized gains (losses) on other-than-temporarily impaired investment securities, net of income taxes |  |  |  |  | 0 |
Unrealized gains (losses) on derivatives during period, net of income taxes |  |  |  |  | (8) |
Pension liability adjustment during period, net of income taxes |  |  |  |  | 4 |
Purchases of treasury stock |  |  |  |  |  | (10)
Cost of shares issued |  |  |  |  |  | 16
Balance, end of period at Mar. 31, 2012 | $ 13,643 | $ 66 | $ 1,433 | $ 15,779 | $ 2,000 | $ (5,635)

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