| Dec 31,
2010 | Dec 31,
2011 | Dec 31,
2012 | Dec 31,
2013 | Dec 31,
2014 | Dec 31,
2015 | Dec 31,
2016 | Dec 31,
2017 | Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 | Dec 31,
2024 |
|---|
| Net income | 834 | 143 | 320 | 544 | 355 | 375 | 441 | 457 | 582 | 612 | 815 | 785 | 674 | 818 | 786 |
|---|
| Depreciation of property and equipment | - | 56 | 55 | 61 | 64 | 61 | 58 | 50 | 48 | 46 | 46 | 48 | 47 | 44 | 37 |
|---|
| Stock-based compensation | 52 | 43 | 33 | 37 | 44 | 46 | 50 | 53 | 53 | 51 | 48 | 53 | 59 | 60 | 61 |
|---|
| Investment Income, Amortization of Discount | - | - | - | - | - | - | - | 15 | 18 | 15 | 6 | - | - | 28 | 21 |
|---|
| Other Noncash Income (Expense) | - | -13 | -11 | 13 | -11 | 2 | 4 | - | - | - | - | -6 | 4 | -3 | -4 |
|---|
| Prepaid expenses and other assets | 19 | -11 | 9 | 3 | -12 | 2 | -9 | 14 | 1 | -3 | 9 | 14 | -9 | 2 | 12 |
|---|
| Accounts payable and accrued liabilities | 35 | 18 | -13 | 19 | 45 | 21 | 40 | 15 | -2 | -0 | 2 | 15 | -0 | -2 | -29 |
|---|
| Deferred revenues | 80 | 66 | 84 | 43 | 35 | 71 | 14 | 25 | 20 | 16 | 29 | 90 | 66 | 27 | 58 |
|---|
| Net deferred income taxes | - | - | 72 | -113 | -44 | -82 | -88 | 113 | 54 | 44 | 192 | 177 | 19 | 66 | -20 |
|---|
| Net Cash Provided by (Used in) Operating Activities | 215 | 336 | 538 | 579 | 601 | 651 | 668 | 703 | 698 | 754 | 730 | 807 | 831 | 854 | 903 |
|---|
| Proceeds from Sale, Maturity and Collection of Investments | 314 | 546 | 1,234 | 3,509 | 3,429 | 2,767 | 3,818 | 4,562 | 4,032 | 2,248 | 2,306 | 2,654 | 1,722 | 1,279 | 1,195 |
|---|
| Purchases of marketable securities | 788 | 79 | 2,623 | 3,450 | 3,277 | 3,219 | 3,691 | 4,930 | 2,977 | 2,031 | 2,355 | 2,871 | 1,338 | 1,331 | 881 |
|---|
| Purchases of property and equipment | 81 | 193 | 53 | 66 | 39 | 41 | 27 | 49 | 37 | 40 | 43 | 53 | 27 | 46 | 28 |
|---|
| Net cash provided by (used in) investing activities | 603 | 273 | -1,442 | -11 | 113 | -497 | -40 | -405 | 1,070 | 167 | -72 | -269 | 356 | -97 | 286 |
|---|
| Repurchases of common stock | 450 | 550 | 326 | 1,036 | 883 | 643 | 662 | 621 | 638 | 783 | 777 | 723 | 1,048 | 901 | 1,226 |
|---|
| Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised | 93 | 50 | 29 | 21 | 18 | 15 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 |
|---|
| Payment of excise tax on repurchases of common stock | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 8 |
|---|
| Proceeds from (Payments for) Other Financing Activities | -1 | -1 | 0 | - | - | - | - | - | - | -1 | - | - | - | -1 | - |
|---|
| Net cash used in financing activities | -745 | -852 | -278 | -357 | -860 | -118 | -624 | -65 | -1,875 | -770 | -765 | -719 | -1,036 | -890 | -1,221 |
|---|
| Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations | - | - | - | - | - | - | - | - | - | - | - | - | -1 | -0 | -1 |
|---|
| Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | - | - | - | - | - | - | - | - | -108 | 151 | -107 | -182 | 150 | -133 | -33 |
|---|
| Cash paid for interest, net of capitalized interest | 149 | 140 | 41 | 59 | 75 | 99 | 116 | 117,234 | 118 | 88 | 87 | 86 | 73 | 73 | 73 |
|---|
| Income Taxes Paid, Net | - | - | 19 | 26 | 35 | 40 | 14 | 28 | 85 | 90 | 133 | 178 | 212 | 240 | 231 |
|---|