| 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 |
|---|
| Net income | 72 | 104 | -37 | -11 | 59 | 66 | 86 | 108 | 151 | 217 | 211 | 235 | 236 | 275 |
|---|
| Depreciation and amortization | - | 29 | 34 | 33 | 35 | 31 | 39 | 31 | 32 | 30 | 33 | 34 | 36 | 41 |
|---|
| Amortization and impairment of intangible assets | 48 | 22 | 23 | 23 | 16 | 12 | 10 | 11 | 8 | 8 | 10 | 11 | 10 | - |
|---|
| Amortization of intangible assets | 24 | 22 | 22 | 23 | 16 | 12 | 10 | 11 | 8 | 8 | 10 | 11 | 10 | 6 |
|---|
| Acquisition-related contingent consideration | - | - | - | -11 | -2 | -1 | 2 | 2 | 0 | 2 | 6 | -0 | 2 | 4 |
|---|
| Provision for expected credit losses | 11 | 13 | 14 | 13 | 18 | 16 | 9 | 15 | 18 | 20 | 20 | 16 | 20 | 35 |
|---|
| Share-based compensation | 27 | 37 | 29 | 35 | 23 | 18 | 17 | 16 | 16 | 18 | 23 | 23 | 25 | 30 |
|---|
| Amortization of Debt Issuance Costs and Discounts | - | - | - | - | - | - | - | - | 5 | 12 | 11 | 12 | 2 | 2 |
|---|
| Deferred income taxes | - | - | - | - | - | - | - | - | - | - | -9 | 5 | -10 | -25 |
|---|
| Accounts receivable, billed and unbilled | 19 | 94 | 4 | 56 | 43 | 36 | -3 | 51 | 72 | 142 | 27 | 61 | 183 | 229 |
|---|
| Notes receivable | 25 | 4 | 26 | 8 | 18 | -3 | -3 | -15 | -9 | -10 | -8 | -13 | 0 | 23 |
|---|
| Prepaid expenses and other assets | -1 | -4 | 2 | 7 | -11 | 4 | 3 | -1 | 2 | 23 | -5 | 1 | -0 | -8 |
|---|
| Accounts payable, accrued expenses and other | - | 11 | -12 | 9 | 1 | -5 | 3 | 4 | 9 | -9 | 14 | -2 | 8 | 9 |
|---|
| Income taxes | 12 | 22 | -7 | 8 | 15 | 18 | 22 | -26 | 12 | 24 | -23 | 11 | -4 | 29 |
|---|
| Accrued compensation | - | 38 | -21 | 83 | 11 | 5 | 40 | 2 | 53 | 61 | 39 | 60 | 38 | 50 |
|---|
| Billings in excess of services provided | -6 | -9 | 12 | -3 | 8 | -5 | 1 | 16 | -4 | -8 | 7 | 2 | 9 | 14 |
|---|
| Net cash provided by operating activities | 195 | 174 | 120 | 193 | - | - | - | - | 231 | 218 | 327 | 355 | 189 | 224 |
|---|
| Payments for acquisition of businesses, net of cash received | 63 | 62 | 63 | 55 | 23 | 1 | 1 | 9 | - | 19 | 25 | 10 | 7 | - |
|---|
| Purchases of property and equipment and other | 23 | 31 | 28 | 43 | 39 | 31 | 29 | 32 | 32 | 42 | 35 | 69 | 53 | 49 |
|---|
| Net cash used in investing activities | -71 | -94 | -90 | -103 | - | - | - | - | 19 | -61 | -60 | -79 | -60 | -74 |
|---|
| Purchase of short-term investment | - | - | - | - | - | - | - | - | - | - | - | - | - | 24 |
|---|
| Net cash used in investing activities | -71 | -94 | -90 | -103 | - | - | - | - | 19 | -61 | -60 | -79 | -60 | -74 |
|---|
| Proceeds from Lines of Credit | 20 | 25 | 75 | - | - | 200 | - | - | - | 45 | 290 | 403 | 165 | 835 |
|---|
| Repayments under revolving line of credit | 20 | 25 | 75 | - | - | - | - | - | - | 45 | 290 | 403 | 165 | 835 |
|---|
| Payments of debt issuance costs | 3 | - | - | - | - | - | - | - | 16 | - | - | - | 4 | - |
|---|
| Repayment of convertible notes | - | - | - | - | - | - | - | - | - | - | - | - | - | 316 |
|---|
| Purchase and retirement of common stock | 41 | 209 | 50 | 67 | 4 | 27 | 21 | 168 | 56 | 106 | 354 | 46 | 85 | 21 |
|---|
| Payments of debt issuance costs | 3 | - | - | - | - | - | - | - | 16 | - | - | - | 4 | - |
|---|
| Share-based compensation tax withholdings and other | - | - | - | - | - | - | - | - | - | - | - | 9 | 15 | 15 |
|---|
| Purchase and retirement of common stock | 41 | 209 | 50 | 67 | 4 | 27 | 21 | 168 | 56 | 106 | 354 | 46 | 85 | 21 |
|---|
| Payments for business acquisition liabilities | - | - | - | - | - | - | - | 5 | 3 | 2 | 4 | 7 | 5 | 4 |
|---|
| Share-based compensation tax withholdings and other | - | - | - | - | - | - | - | - | - | - | - | 9 | 15 | 15 |
|---|
| Deposits and other | 0 | -1 | -2 | 0 | -1 | 0 | 0 | - | 3 | 2 | 3 | 1 | 4 | 1 |
|---|
| Payments for business acquisition liabilities | - | - | - | - | - | - | - | 5 | 3 | 2 | 4 | 7 | 5 | 4 |
|---|
| Net cash used in financing activities | 144 | -199 | -138 | -43 | - | - | - | - | -118 | -103 | -360 | -62 | -106 | -355 |
|---|
| Deposits and other | 0 | -1 | -2 | 0 | -1 | 0 | 0 | - | 3 | 2 | 3 | 1 | 4 | 1 |
|---|
| Net cash used in financing activities | 144 | -199 | -138 | -43 | - | - | - | - | -118 | -103 | -360 | -62 | -106 | -355 |
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| Effect of exchange rate changes on cash and cash equivalents | - | - | - | - | - | - | - | - | - | 3 | 19 | -15 | -26 | 16 |
|---|
| Net increase (decrease) in cash and cash equivalents | - | - | - | - | - | - | - | - | - | 57 | -74 | 200 | -3 | -188 |
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| Cash paid for interest | - | - | - | - | - | - | - | - | 22 | 8 | 8 | 9 | 8 | 14 |
|---|
| Income Taxes Paid, Net | 33 | 39 | 47 | 35 | 27 | 21 | 20 | 5 | 46 | 51 | 83 | 48 | 77 | 80 |
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| Issuance of stock units under incentive compensation plans | - | - | - | - | - | - | 2 | 2 | 1 | 1 | 2 | 3 | 2 | 2 |
|---|
| Business acquisition liabilities not yet paid | - | - | - | - | - | - | - | - | - | 10 | 6 | 1 | 6 | - |
|---|
| Non-cash additions to property and equipment | - | - | - | - | - | - | - | - | - | - | - | 7 | 4 | 1 |
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