| Sep 30,
2011 | Sep 30,
2012 | Sep 30,
2013 | Sep 30,
2014 | Sep 30,
2015 | Sep 30,
2016 | Sep 30,
2017 | Sep 30,
2018 | Sep 30,
2019 | Sep 30,
2020 | Sep 30,
2021 | Sep 30,
2022 |
|---|
| Net income | 347 | 391 | 412 | 422 | 446 | 409 | 437 | 354 | 479 | 498 | 688 | 550 |
|---|
| Depreciation, Depletion and Amortization | - | 160 | 141 | 163 | 175 | 212 | 215 | 211 | 206 | 198 | 209 | 225 |
|---|
| Amortization of debt issuance cost | - | - | - | - | - | - | - | - | - | 0 | 1 | 1 |
|---|
| Equity-based compensation expense | 37 | 43 | 40 | 45 | 45 | 43 | 45 | 47 | 39 | 42 | 54 | 72 |
|---|
| Gain from sale of a business | - | - | - | - | - | - | - | - | - | - | 226 | 10 |
|---|
| Deferred income taxes | 1 | -5 | 12 | -7 | -27 | -2 | 7 | 25 | -14 | 30 | -51 | -3 |
|---|
| Loss from short-term interest-bearing investments | - | - | - | - | - | - | - | - | -1 | - | -2 | -3 |
|---|
| Accounts receivable, net | - | - | - | -6 | -40 | 71 | 41 | 66 | -7 | -135 | 69 | 65 |
|---|
| Prepaid expenses and other current assets | 11 | -2 | 0 | 2 | -23 | 11 | -11 | 19 | -26 | 11 | 17 | 4 |
|---|
| Other noncurrent assets | 16 | -20 | -29 | -7 | -7 | -3 | 53 | -10 | 2 | 23 | 50 | -20 |
|---|
| Lease assets and liabilities, net | - | - | - | - | - | - | - | - | - | 8 | -10 | -1 |
|---|
| Accounts payable, accrued expenses and accrued personnel | - | - | -4 | 74 | 64 | 60 | 72 | 25 | -60 | -190 | 122 | -84 |
|---|
| Deferred revenue | - | - | - | - | - | - | - | - | -38 | -15 | 194 | -22 |
|---|
| Income taxes payable, net | - | 14 | -5 | 1 | 23 | 10 | -15 | -31 | 6 | -9 | 27 | 16 |
|---|
| Other noncurrent liabilities | 11 | -3 | 28 | 5 | -20 | 24 | 14 | -9 | 7 | 11 | 33 | 59 |
|---|
| Net cash provided by operating activities | 535 | 514 | 671 | - | - | - | - | 557 | 656 | 658 | 926 | 757 |
|---|
| Purchase of property and equipment, net | - | - | - | - | - | - | - | - | 128 | 206 | 210 | 227 |
|---|
| Proceeds from Sale of Debt Securities, Available-for-sale | - | - | - | - | - | - | - | - | 101 | - | 18 | 22 |
|---|
| Purchase of short-term interest-bearing investments | - | - | - | - | - | - | - | - | - | 1 | 277 | 34 |
|---|
| Net cash paid for business and intangible assets acquisitions | - | - | - | 181 | 263 | 283 | 18 | 355 | 61 | 249 | 143 | 24 |
|---|
| Net cash received from sale of a business | - | - | - | - | - | - | - | - | - | - | -289 | -10 |
|---|
| Other | - | 9 | 3 | -4 | -1 | 19 | 30 | 3 | -1 | 6 | 6 | 9 |
|---|
| Net cash used in investing activities | -222 | -17 | -297 | - | - | - | - | -362 | -87 | -462 | -329 | -263 |
|---|
| Proceeds from Lines of Credit | 250 | 200 | 200 | 210 | 220 | 200 | 200 | 120 | - | 450 | - | - |
|---|
| Payments under financing arrangements | 200 | 250 | 200 | 200 | 210 | 220 | 400 | 120 | - | 350 | 100 | - |
|---|
| Proceeds from issuance of debt, net | - | - | - | - | - | - | - | - | - | 644 | - | - |
|---|
| Repurchase of shares | 624 | 485 | 367 | 372 | 454 | 413 | 341 | 419 | 398 | 361 | 680 | 508 |
|---|
| Proceeds from Stock Options Exercised | 56 | 87 | 213 | 128 | 78 | 90 | 88 | 81 | 41 | 98 | 89 | 83 |
|---|
| Payments of dividends | - | - | 84 | 91 | 101 | 109 | 122 | 134 | 148 | 164 | 177 | 186 |
|---|
| Payment of contingent consideration from a business acquisition | - | - | - | - | - | - | - | - | 7 | 1 | 3 | 18 |
|---|
| Other | - | - | - | -1 | -0 | -0 | - | - | - | - | - | - |
|---|
| Net cash (used in) provided by financing activities | -519 | -449 | -238 | - | - | - | - | -426 | -517 | 315 | -871 | -630 |
|---|
| Net (decrease) increase in cash and cash equivalents | - | - | - | - | - | - | - | - | 53 | 512 | -274 | -136 |
|---|
| Income Taxes Paid, Net | 20 | 37 | 38 | 59 | 51 | 50 | 68 | 56 | 76 | 45 | 146 | 80 |
|---|
| Interest | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 7 | 5 | 19 | 17 |
|---|