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Parent Company (Details 2) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net income | $ 637 | $ 1,250 | $ 1,339 | $ 1,256 | $ 1,192 | $ 1,235 | $ 1,331 | $ 1,177 | $ 4,482 | $ 4,935 | $ 4,057
Equity in net income of subsidiaries and affiliates: |  |  |  |  |  |  |  |  |  |  |
Income from discontinued operations, net of tax | 0 | 0 | 0 | 0 | 0 | 0 | (36) | 0 | 0 | (36) | 0
Gain on sale of securities |  |  |  |  |  |  |  |  | (126) | (16) | 5
Premium paid on debt exchange |  |  |  |  |  |  |  |  | (541) | 0 | 0
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 7,082 | 9,768 | 8,729
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |
Premises and equipment |  |  |  |  |  |  |  |  | 1,053 | 1,189 | 878
Purchase of investments |  |  |  |  |  |  |  |  | (473) | (1,158) | (7,804)
Net cash used in investing activities |  |  |  |  |  |  |  |  | (6,545) | (491) | (1,229)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |
Principal payment of debt |  |  |  |  |  |  |  |  | 14,076 | 21,029 | 17,670
Issuance of American Express common shares and other |  |  |  |  |  |  |  |  | 443 | 594 | 663
Repurchase of American Express common shares |  |  |  |  |  |  |  |  | (3,952.0) | (2,300.0) | (590.0)
Dividends paid |  |  |  |  |  |  |  |  | (902) | (861) | (867)
Net cash used in financing activities |  |  |  |  |  |  |  |  | (3,268) | (677) | (7,878)
Net change in cash and cash equivalents |  |  |  |  |  |  |  |  | (2,643) | 8,537 | (243)
Cash and cash equivalents at beginning of year |  |  |  | 24,893 |  |  |  | 16,356 | 24,893 | 16,356 | 16,599
Cash and cash equivalents at end of year | 22,250 |  |  |  | 24,893 |  |  |  | 22,250 | 24,893 | 16,356
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 4,482 | 4,935 | 4,057
Equity in net income of subsidiaries and affiliates: |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  |  |  |  |  |  |  |  | (4,966) | (5,385) | (4,530)
Income from discontinued operations, net of tax |  |  |  |  |  |  |  |  | 0 | 36 | 0
Dividends received from subsidiaries and affiliates |  |  |  |  |  |  |  |  | 3,355 | 3,773 | 1,999
Gain on sale of securities |  |  |  |  |  |  |  |  | (121) | (15) | 0
Other operating activities, primarily with subsidiaries and affiliates |  |  |  |  |  |  |  |  | 196 | 671 | (39)
Premium paid on debt exchange |  |  |  |  |  |  |  |  | (541) | 0 | 0
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 2,405 | 3,943 | 1,487
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |
Sale/redemption of investments |  |  |  |  |  |  |  |  | 118 | 20 | 9
Premises and equipment |  |  |  |  |  |  |  |  | (38) | (35) | (32)
Loans to subsidiaries and affiliates |  |  |  |  |  |  |  |  | (1,601) | (189) | (1,064)
Purchase of investments |  |  |  |  |  |  |  |  | 0 | (2) | (3)
Investments in subsidiaries and affiliates |  |  |  |  |  |  |  |  | (11) | (18) | 0
Net cash used in investing activities |  |  |  |  |  |  |  |  | (1,532) | (224) | (1,090)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |
Principal payment of debt |  |  |  |  |  |  |  |  | 0 | (400) | 0
Short-term debt of subsidiaries and affiliates |  |  |  |  |  |  |  |  | 1,421 | 895 | 0
Long-term debt of subsidiaries and affiliates |  |  |  |  |  |  |  |  | 0 | 0 | (15)
Issuance of American Express common shares and other |  |  |  |  |  |  |  |  | 443 | 594 | 663
Repurchase of American Express common shares |  |  |  |  |  |  |  |  | (3,952.0) | (2,300.0) | (590.0)
Dividends paid |  |  |  |  |  |  |  |  | (902) | (861) | (867)
Net cash used in financing activities |  |  |  |  |  |  |  |  | (2,990) | (2,072) | (809)
Net change in cash and cash equivalents |  |  |  |  |  |  |  |  | (2,117) | 1,647 | (412)
Cash and cash equivalents at beginning of year |  |  |  | 6,914 |  |  |  | 5,267 | 6,914 | 5,267 | 5,679
Cash and cash equivalents at end of year | $ 4,797 |  |  |  | $ 6,914 |  |  |  | $ 4,797 | $ 6,914 | $ 5,267

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