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Parent Company (Details 2) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net income | $ 825 | $ 1,142 | $ 2,015 | $ 1,426 | $ 899 | $ 1,266 | $ 1,473 | $ 1,525 | $ 5,408 | $ 5,163 | $ 5,885
Adjustments to reconcile income from continuing operations to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Gain on sale of securities |  |  |  |  |  |  |  |  | (9) | (1) | (100)
Premium paid on debt exchange |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 8,224 | 10,611 | 10,990
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |
Purchase of investments |  |  |  |  |  |  |  |  | (2,162) | (1,713) | (886)
Purchase of premises and equipment |  |  |  |  |  |  |  |  | (1,375) | (1,341) | (1,195)
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | 1,868 | (8,193) | (7,967)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |
Principal payments on long term debt |  |  |  |  |  |  |  |  | (9,848) | (19,246) | (12,768)
Issuance of American Express preferred shares |  |  |  |  |  |  |  |  | 0 | 841 | 742
Issuance of American Express common shares and other |  |  |  |  |  |  |  |  | 177 | 193 | 362
Repurchase of American Express common shares |  |  |  |  |  |  |  |  | (4,431) | (4,480) | (4,389)
Dividends paid |  |  |  |  |  |  |  |  | (1,207) | (1,172) | (1,041)
Net cash (used in) provided by financing activities |  |  |  |  |  |  |  |  | (7,532) | (1,668) | 11
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 2,446 | 474 | 2,802
Cash and cash equivalents at beginning of year |  |  |  | 22,762 |  |  |  | 22,288 | 22,762 | 22,288 | 19,486
Cash and cash equivalents at end of year | 25,208 |  |  |  | 22,762 |  |  |  | 25,208 | 22,762 | 22,288
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 5,408 | 5,163 | 5,885
Adjustments to reconcile income from continuing operations to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries and affiliates |  |  |  |  |  |  |  |  | (5,903) | (5,633) | (6,301)
Dividends received from subsidiaries and affiliates |  |  |  |  |  |  |  |  | 4,999 | 5,331 | 5,455
Gain on sale of securities |  |  |  |  |  |  |  |  | 0 | 0 | (99)
Other operating activities, primarily with subsidiaries and affiliates |  |  |  |  |  |  |  |  | (102) | 332 | 173
Premium paid on debt exchange |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 4,402 | 5,193 | 5,113
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |
Sales of available-for-sale investment securities |  |  |  |  |  |  |  |  | 0 | 0 | 111
Purchase of investments |  |  |  |  |  |  |  |  | 0 | (3) | 0
Purchase of premises and equipment |  |  |  |  |  |  |  |  | (1) | (29) | (39)
Loans to subsidiaries and affiliates |  |  |  |  |  |  |  |  | 4,142 | (3,952) | (2,574)
Investments in subsidiaries and affiliates |  |  |  |  |  |  |  |  | (25) | 0 | 0
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | 4,116 | (3,984) | (2,502)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |
Principal payments on long term debt |  |  |  |  |  |  |  |  | (1,350) | 0 | (655)
Short-term debt of subsidiaries and affiliates |  |  |  |  |  |  |  |  | (2,879) | 986 | 5,118
Issuance of American Express preferred shares |  |  |  |  |  |  |  |  | 0 | 841 | 742
Issuance of American Express common shares and other |  |  |  |  |  |  |  |  | 176 | 192 | 362
Repurchase of American Express common shares |  |  |  |  |  |  |  |  | (4,430) | (4,480) | (4,389)
Dividends paid |  |  |  |  |  |  |  |  | (1,206) | (1,172) | (1,041)
Net cash (used in) provided by financing activities |  |  |  |  |  |  |  |  | (9,689) | (3,633) | 137
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | (1,171) | (2,424) | 2,748
Cash and cash equivalents at beginning of year |  |  |  | $ 6,400 |  |  |  | $ 8,824 | 6,400 | 8,824 | 6,076
Cash and cash equivalents at end of year | $ 5,229 |  |  |  | $ 6,400 |  |  |  | $ 5,229 | $ 6,400 | $ 8,824

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