| Dec 31, 2010 | Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Mar 31, 2015 | Mar 31, 2016 | Mar 31, 2017 | Mar 31, 2018 | Mar 31, 2019 | Mar 31, 2020 | Mar 31, 2021 | Mar 31, 2022 | Mar 31, 2023 | Mar 31, 2024 | Mar 31, 2025 |
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| Net income | 160 | 202 | 129 | 146 | 162 | 122 | 6 | 114 | 264 | 276 | 383 | 452 | 517 | 760 | 966 |
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| Depreciation, amortization, and accretion | 12 | 29 | 33 | 41 | 49 | 50 | 53 | 49 | 45 | 39 | 41 | 43 | 48 | 58 | 69 |
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| Amortization on cloud computing arrangements | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 2 | 2 | 2 |
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| Loss on extinguishment of debt | - | - | - | - | - | - | - | - | -0 | - | - | - | -0 | - | - |
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| Bad debt expense | -1 | -1 | - | - | 1 | 5 | 3 | 4 | 3 | 3 | 3 | -0 | 2 | 1 | 5 |
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| Deferred tax benefit | -2 | -0 | -6 | -4 | 10 | 8 | -24 | 8 | 7 | 3 | -8 | -28 | -10 | -2 | -6 |
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| Stock-based compensation | 13 | 15 | 15 | 13 | 14 | 7 | 6 | 14 | 15 | 14 | 23 | 27 | 27 | 37 | 38 |
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| Loss on disposal of assets | - | - | - | - | - | 1 | -1 | -0 | -0 | -1 | -1 | -0 | -3 | -0 | -3 |
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| Impairment of intangible assets | - | - | - | - | - | - | - | - | - | - | 4 | - | - | 8 | - |
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| Impairment of cloud computing arrangements, operating lease, and other long-lived assets | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 4 |
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| Trade accounts receivable, net | 39 | 63 | -0 | -7 | 37 | 24 | 1 | -11 | 16 | 10 | 33 | 87 | 1 | -4 | 41 |
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| Inventories | 41 | 128 | 47 | -41 | 27 | 61 | -1 | 1 | -9 | 33 | -33 | 229 | 26 | -59 | 24 |
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| Prepaid expenses and other current assets | 7 | 76 | -24 | 59 | 10 | 4 | -8 | -11 | 1 | -2 | 22 | 19 | 6 | 38 | -21 |
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| Income tax receivable | - | - | - | - | 15 | 8 | 1 | -27 | 0 | 6 | -2 | 12 | -13 | 39 | -7 |
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| Net operating lease assets and lease liabilities | - | - | - | - | - | - | - | - | - | 3 | -0 | -3 | 8 | 1 | 3 |
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| Other assets | 2 | 5 | 3 | 4 | 0 | 3 | -2 | 2 | -2 | 7 | 3 | 28 | -13 | 10 | -7 |
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| Trade accounts payable | 20 | 38 | 19 | 21 | 9 | 15 | -8 | -2 | 31 | 23 | 79 | 89 | -74 | 120 | 36 |
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| Other accrued expenses | 16 | 1 | -10 | 34 | 4 | -16 | -1 | 29 | -7 | -11 | 54 | -20 | 12 | 44 | 22 |
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| Income tax payable | 5 | 6 | -6 | 24 | 5 | -0 | -4 | -4 | 4 | -6 | 26 | -24 | 5 | 35 | -29 |
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| Other long-term liabilities | - | 3 | 4 | 6 | 7 | 7 | 3 | 62 | 2 | 1 | 1 | 1 | 18 | -5 | -33 |
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| Net cash provided by operating activities | 140 | - | - | - | - | - | - | 327 | 360 | 286 | 596 | 172 | 537 | 1,033 | 1,045 |
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| Purchases of property and equipment | 22 | 56 | 62 | 80 | 91 | 65 | 44 | 35 | 29 | 32 | 32 | 51 | 81 | 89 | 86 |
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| Proceeds from sale of assets | - | - | - | - | - | - | - | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 |
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| Net cash used in investing activities | -2 | - | - | - | - | - | - | -35 | -29 | -32 | -32 | -51 | -81 | -89 | -75 |
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| Loan origination costs on revolving credit facilities | - | - | - | - | 1 | 0 | - | - | 1 | - | - | - | 2 | - | - |
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| Proceeds from issuance of stock | - | - | - | - | - | - | - | - | - | 4 | 2 | 2 | 2 | 2 | 4 |
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| Proceeds from Stock Options Exercised | 0 | 0 | - | 0 | - | - | - | - | - | - | 7 | 1 | 4 | 5 | 1 |
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| Repurchases of common stock | 10 | 20 | 221 | - | 107 | 94 | 13 | 150 | 161 | 190 | 99 | 357 | 297 | 415 | 567 |
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| Cash paid for excise taxes related to repurchases of common stock | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 4 |
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| Cash paid for shares withheld for taxes | - | 23 | 7 | 7 | 6 | 4 | 8 | 8 | 5 | 6 | 7 | 14 | 17 | 10 | 15 |
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| Net cash used in financing activities | -9 | - | - | - | - | - | - | -158 | -167 | -192 | -130 | -367 | -309 | -418 | -581 |
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| Effect of foreign currency exchange rates on cash and cash equivalents | - | - | - | - | - | - | - | - | -4 | -3 | 5 | 0 | -9 | -6 | -1 |
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| Net change in cash and cash equivalents | - | - | - | - | - | - | - | - | 160 | 60 | 440 | -246 | 138 | 520 | 387 |
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| Income taxes | 82 | 62 | 67 | 39 | 54 | 30 | 14 | 14 | 54 | 75 | 104 | 192 | 135 | 234 | 345 |
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| Interest | 0 | 0 | 3 | 3 | 3 | 5 | 5 | 4 | 4 | 2 | 3 | 2 | 2 | 2 | 2 |
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| Operating leases | - | - | - | - | - | - | - | - | - | 61 | 57 | 56 | 60 | 66 | 70 |
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| Change In Capital Expenditures Incurred But Not Yet Paid | - | - | - | - | - | - | - | - | - | - | - | 3 | 5 | -7 | 4 |
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| Accrued Asset Retirement Obligations | - | - | - | - | - | - | - | - | - | - | - | 4 | 8 | 2 | 2 |
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| Leasehold Improvements from Tenant Allowance | - | - | - | - | - | - | - | - | - | - | - | 4 | - | 8 | - |
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| Accrued for shares withheld for taxes | 2 | 2 | 2 | 4 | - | 1 | 1 | 0 | - | - | 12 | 8 | 5 | 22 | 17 |
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| Excise Taxes Accrued For Repurchases Of Common Stock | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 3 | 5 |
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