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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2019
Stockholders' Equity Attributable to Parent [Abstract] |
Schedule of Stock Repurchases | The following table summarizes our stock repurchases under the 2016 Program (in millions, except per share amounts):
|  | Year ended December 31,
|  | 2019 |  | 2018 |  | 2017
Shares repurchased and retired |  | 26 |  |  | 40 |  |  | 13 |
Amount |  | $ | 1,749 |  |  | $ | 2,900 |  |  | $ | 954 |
Average price per share |  | $ | 66.36 |  |  | $ | 72.95 |  |  | $ | 71.79 |
Reduction to common stock and APIC as a result of stock repurchases | The following table summarizes the reduction of common stock and APIC and the charge to retained earnings as a result of our stock repurchases (in millions):
|  | Year ended December 31,
|  | 2019 |  | 2018 |  | 2017
Reduction of common stock and APIC |  | $ | 77 |  |  | $ | 112 |  |  | $ | 34 |
Charge to retained earnings |  | $ | 1,791 |  |  | $ | 2,940 |  |  | $ | 1,028 |
Schedule of Dividends Declared | The following table summarizes cash dividends declared on our common stock (in millions, except per share amounts):
|  | 2019 |  | 2018
|  | Dividend Per Share |  | Amount |  | Dividend Per Share |  | Amount
First quarter |  | $ | 0.63 |  |  | $ | 814 |  |  | $ | 0.57 |  |  | $ | 752 |
Second quarter |  | 0.63 |  |  | 810 |  |  | 0.57 |  |  | 747 |
Third quarter |  | 0.63 |  |  | 807 |  |  | 0.57 |  |  | 746 |
Fourth quarter |  | 0.63 |  |  | 808 |  |  | 0.57 |  |  | 741 |
Total |  | $ | 2.52 |  |  | $ | 3,239 |  |  | $ | 2.28 |  |  | $ | 2,986 |
Schedule of accumulated OCI by component | The following table summarizes the changes in AOCI by component, net of tax (in millions):
|  | Foreign Currency Translation |  | Unrealized Gains and Losses on Available-for-Sale Debt Securities |  | Unrealized Gains and Losses on Cash Flow Hedges |  | Total
Balance at December 31, 2017 |  | $ | 85 |  |  | $ | 194 |  |  | $ | (114 | ) |  | $ | 165 |
Reclassifications to retained earnings as a result of the adoption of new accounting standards |  | — |  |  | (293 | ) |  | — |  |  | (293 | )
Balance at January 1, 2018 |  | $ | 85 |  |  | $ | (99 | ) |  | $ | (114 | ) |  | $ | (128 | )
Net unrealized (loss) gain |  | (38 | ) |  | 43 |  |  | 112 |  |  | 117 |
Reclassifications to net income |  | — |  |  | 4 |  |  | 87 |  |  | 91 |
Net current period other comprehensive (loss) income |  | (38 | ) |  | 47 |  |  | 199 |  |  | 208 |
Balance at December 31, 2018 |  | $ | 47 |  |  | $ | (52 | ) |  | $ | 85 |  |  | $ | 80 |
Net unrealized gain |  | 6 |  |  | 54 |  |  | 72 |  |  | 132 |
Reclassifications to net income |  | — |  |  | (1 | ) |  | (126 | ) |  | (127 | )
Net current period other comprehensive income (loss) |  | 6 |  |  | 53 |  |  | (54 | ) |  | 5 |
Balance at December 31, 2019 |  | $ | 53 |  |  | $ | 1 |  |  | $ | 31 |  |  | $ | 85 |

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