CONSOLIDATED BALANCE SHEETS (UNAUDITED) $ in Thousands |
Sep. 30, 2025
USD ($)
shares
|
Sep. 30, 2025
€ / shares
|
Jun. 30, 2025
USD ($)
shares
|
Jun. 30, 2025
€ / shares
|
Mar. 31, 2025
USD ($)
shares
|
Mar. 31, 2025
€ / shares
|
Dec. 31, 2024
USD ($)
|
Sep. 30, 2024
USD ($)
shares
|
Sep. 30, 2024
€ / shares
|
Jun. 30, 2024
USD ($)
shares
|
Jun. 30, 2024
€ / shares
|
Mar. 31, 2024
USD ($)
shares
|
Mar. 31, 2024
€ / shares
|
Dec. 31, 2023
USD ($)
|
Sep. 30, 2023
USD ($)
shares
|
Sep. 30, 2023
€ / shares
|
Jun. 30, 2023
USD ($)
shares
|
Jun. 30, 2023
€ / shares
|
Mar. 31, 2023
USD ($)
shares
|
Mar. 31, 2023
€ / shares
|
Dec. 31, 2022
USD ($)
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Current assets: | |||||||||||||||||||||
| Cash and cash equivalents | $ 468,888 | $ 390,396 | $ 526,698 | $ 695,507 | $ 506,553 | $ 396,082 | $ 313,065 | $ 270,176 | $ 279,880 | ||||||||||||
| Available for sale investments | 0 | 0 | 1,955 | 1,954 | 1,653 | 1,653 | |||||||||||||||
| Accounts receivable, net of allowance for credit losses | 1,387,690 | 1,367,255 | 1,387,462 | 1,396,080 | 1,568,652 | 1,702,519 | 1,850,362 | 1,759,111 | 1,802,726 | ||||||||||||
| Unbilled services (unbilled revenue) | 1,195,747 | 1,173,021 | 1,101,511 | 1,118,860 | 1,021,519 | 949,567 | 828,453 | 902,321 | 880,412 | ||||||||||||
| Other receivables | 91,018 | 80,637 | 87,490 | 82,760 | 78,113 | 76,638 | 121,687 | 129,101 | 143,727 | ||||||||||||
| Prepayments and other current assets | 138,788 | 143,263 | 153,340 | 140,536 | 139,244 | 149,127 | 150,193 | 152,774 | 170,167 | ||||||||||||
| Income taxes receivable | 61,626 | 83,292 | 63,969 | 102,931 | 79,216 | 75,544 | 42,039 | 70,021 | 56,820 | ||||||||||||
| Total current assets | 3,343,757 | 3,237,864 | 3,320,470 | 3,536,674 | 3,393,297 | 3,351,432 | 3,307,753 | 3,285,157 | 3,335,385 | ||||||||||||
| Non-current assets: | |||||||||||||||||||||
| Property, plant and equipment, net | 377,939 | 377,979 | 378,253 | 365,726 | 353,844 | 353,302 | 342,262 | 346,521 | 348,106 | ||||||||||||
| Goodwill | 8,728,375 | 9,092,410 | 9,065,335 | $ 9,051,410 | 9,085,447 | 9,016,549 | 9,018,301 | 8,982,896 | 8,993,583 | 8,979,134 | |||||||||||
| Intangible assets, net | 3,297,583 | 3,443,096 | 3,501,307 | 3,605,814 | 3,632,354 | 3,748,939 | 3,934,673 | 4,049,793 | 4,164,410 | ||||||||||||
| Operating right-of-use assets | 134,341 | 140,352 | 147,377 | 156,955 | 149,782 | 159,620 | 132,319 | 144,514 | 150,495 | ||||||||||||
| Other receivables | 89,932 | 85,032 | 75,122 | 88,445 | 87,609 | 87,193 | 52,797 | 64,140 | 71,612 | ||||||||||||
| Income taxes receivable | 11,395 | 11,395 | 11,395 | 13,682 | 14,994 | 4,155 | 37,830 | 21,593 | 17,724 | ||||||||||||
| Deferred tax asset | 103,266 | 88,731 | 79,860 | 73,687 | 72,324 | 73,346 | 84,493 | 81,648 | 89,845 | ||||||||||||
| Investments in equity | 71,284 | 67,743 | 62,160 | 53,720 | 50,220 | 51,164 | 41,790 | 35,298 | 32,052 | ||||||||||||
| Total Assets | 16,157,872 | 16,544,602 | 16,641,279 | 16,980,150 | 16,770,973 | 16,847,452 | 16,916,813 | 17,022,247 | 17,188,763 | ||||||||||||
| Current liabilities: | |||||||||||||||||||||
| Accounts payable | 113,288 | 94,503 | 118,168 | 106,172 | 83,037 | 113,579 | 87,317 | 46,920 | 85,126 | ||||||||||||
| Unearned revenue | 1,546,887 | 1,515,422 | 1,495,847 | 1,477,952 | 1,544,275 | 1,585,694 | 1,563,948 | 1,493,403 | 1,480,275 | ||||||||||||
| Other liabilities | 991,224 | 891,661 | 987,060 | 1,037,886 | 991,823 | 993,512 | 941,581 | 987,635 | 1,022,645 | ||||||||||||
| Income taxes payable | 50,798 | 21,282 | 50,636 | 52,585 | 27,935 | 41,905 | 30,815 | 29,182 | 57,973 | ||||||||||||
| Current bank credit lines, loan facilities and notes | 529,762 | 29,762 | 29,762 | 29,762 | 29,762 | 79,762 | 130,150 | 105,150 | 135,150 | ||||||||||||
| Total current liabilities | 3,231,959 | 2,552,630 | 2,681,473 | 2,704,357 | 2,676,832 | 2,814,452 | 2,753,811 | 2,662,290 | 2,781,169 | ||||||||||||
| Non-current liabilities: | |||||||||||||||||||||
| Non-current bank credit lines, loan facilities and notes, net | 2,878,547 | 3,384,488 | 3,390,438 | 3,402,368 | 3,408,157 | 3,419,734 | 3,911,522 | 4,206,936 | 4,353,534 | ||||||||||||
| Lease liabilities | 125,110 | 132,713 | 138,354 | 145,714 | 145,464 | 145,542 | 121,424 | 129,079 | 133,048 | ||||||||||||
| Non-current other liabilities | 98,738 | 96,305 | 84,961 | 49,405 | 47,620 | 45,236 | 40,909 | 38,686 | 45,425 | ||||||||||||
| Non-current income taxes payable | 107,542 | 102,626 | 131,239 | 203,228 | 198,091 | 189,747 | 242,972 | 241,410 | 243,813 | ||||||||||||
| Deferred tax liability | 722,108 | 775,193 | 788,943 | 816,971 | 842,215 | 868,492 | 883,405 | 933,906 | 956,868 | ||||||||||||
| Commitments and contingencies | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Total Liabilities | 7,164,004 | 7,043,955 | 7,215,408 | 7,322,043 | 7,318,379 | 7,483,203 | 7,954,043 | 8,212,307 | 8,513,857 | ||||||||||||
| Ordinary shares, par value (in EUR cents per share) | € / shares | € 0.06 | € 0.06 | € 0.06 | € 0.06 | € 0.06 | € 0.06 | € 0.06 | € 0.06 | € 0.06 | ||||||||||||
| Shareholders' Equity: | |||||||||||||||||||||
| 76,567,325 shares issued and outstanding at December 31, 2025, (2024: 80,756,860 and 2023: 82,495,086) | 6,290 | 6,390 | 6,505 | 6,703 | 6,720 | 6,711 | 6,688 | 6,676 | 6,662 | ||||||||||||
| Additional paid-in capital | 7,100,059 | 7,054,324 | 7,037,344 | 7,011,547 | 6,988,736 | 6,970,079 | 6,924,073 | 6,891,494 | 6,867,887 | ||||||||||||
| Other undenominated capital | 1,606 | 1,506 | 1,389 | 1,184 | 1,162 | 1,162 | 1,162 | 1,162 | 1,162 | ||||||||||||
| Accumulated other comprehensive loss | (86,944) | (68,763) | (173,191) | (110,062) | (179,559) | (166,462) | (190,190) | (156,528) | (159,896) | ||||||||||||
| Retained earnings | 1,972,857 | 2,507,190 | 2,553,824 | 2,748,735 | 2,635,535 | 2,552,759 | 2,221,037 | 2,067,136 | 1,959,091 | ||||||||||||
| Total Shareholders' Equity | 8,993,868 | 9,500,647 | 9,425,871 | $ 9,441,354 | 9,658,107 | 9,452,594 | 9,364,249 | $ 9,211,446 | 8,962,770 | 8,809,940 | 8,674,906 | $ 8,526,793 | |||||||||
| Total Liabilities and Shareholders' Equity | $ 16,157,872 | $ 16,544,602 | $ 16,641,279 | $ 16,980,150 | $ 16,770,973 | $ 16,847,452 | $ 16,916,813 | $ 17,022,247 | $ 17,188,763 | ||||||||||||
| Ordinary shares, shares authorized (in shares) | shares | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | ||||||||||||
| Ordinary shares, shares issued (in shares) | shares | 76,359,932 | 77,772,130 | 79,464,252 | 82,559,366 | 82,816,600 | 82,683,805 | 82,326,976 | 82,151,049 | 81,928,422 | ||||||||||||
| Ordinary shares, shares outstanding (in shares) | shares | 76,359,932 | 77,772,130 | 79,464,252 | 82,559,366 | 82,816,600 | 82,683,805 | 82,326,976 | 82,151,049 | 81,928,422 | ||||||||||||
| As Reported | |||||||||||||||||||||
| Current assets: | |||||||||||||||||||||
| Cash and cash equivalents | $ 468,888 | $ 390,396 | $ 526,698 | $ 695,507 | $ 506,553 | $ 396,082 | $ 313,065 | $ 270,176 | $ 279,880 | ||||||||||||
| Available for sale investments | 0 | 0 | 1,955 | 1,954 | 1,653 | 1,653 | |||||||||||||||
| Accounts receivable, net of allowance for credit losses | 1,387,690 | 1,367,255 | 1,387,462 | 1,396,080 | 1,569,642 | 1,862,468 | 1,850,362 | 1,759,111 | 1,802,726 | ||||||||||||
| Unbilled services (unbilled revenue) | 1,258,706 | 1,244,560 | 1,197,080 | 1,361,198 | 1,230,948 | 993,141 | 941,884 | 985,034 | 974,260 | ||||||||||||
| Other receivables | 91,018 | 80,637 | 87,490 | 82,760 | 78,113 | 76,638 | 121,687 | 129,101 | 143,727 | ||||||||||||
| Prepayments and other current assets | 140,713 | 143,263 | 153,340 | 140,536 | 139,244 | 149,127 | 150,193 | 152,774 | 170,167 | ||||||||||||
| Income taxes receivable | 61,626 | 83,292 | 63,969 | 102,931 | 79,216 | 75,544 | 42,039 | 70,021 | 56,820 | ||||||||||||
| Total current assets | 3,408,641 | 3,309,403 | 3,416,039 | 3,779,012 | 3,603,716 | 3,554,955 | 3,421,184 | 3,367,870 | 3,429,233 | ||||||||||||
| Non-current assets: | |||||||||||||||||||||
| Property, plant and equipment, net | 390,837 | 377,979 | 378,253 | 365,726 | 353,844 | 353,302 | 342,262 | 346,521 | 348,106 | ||||||||||||
| Goodwill | 8,927,323 | 9,092,410 | 9,065,335 | 9,085,447 | 9,016,549 | 9,018,301 | 8,982,896 | 8,993,583 | 8,979,134 | ||||||||||||
| Intangible assets, net | 3,384,322 | 3,443,096 | 3,501,307 | 3,605,814 | 3,632,354 | 3,748,939 | 3,934,673 | 4,049,793 | 4,164,410 | ||||||||||||
| Operating right-of-use assets | 134,341 | 140,352 | 147,377 | 156,955 | 149,782 | 159,620 | 132,319 | 144,514 | 150,495 | ||||||||||||
| Other receivables | 89,932 | 85,032 | 75,122 | 88,445 | 87,609 | 87,193 | 52,797 | 64,140 | 71,612 | ||||||||||||
| Income taxes receivable | 0 | 0 | 0 | 0 | 0 | 0 | 40,481 | 25,169 | 22,076 | ||||||||||||
| Deferred tax asset | 100,810 | 86,275 | 77,404 | 75,993 | 74,787 | 74,777 | 83,095 | 80,772 | 89,406 | ||||||||||||
| Investments in equity | 71,284 | 67,743 | 62,160 | 53,720 | 50,220 | 51,164 | 41,790 | 35,298 | 32,052 | ||||||||||||
| Total Assets | 16,507,490 | 16,602,290 | 16,722,997 | 17,211,112 | 16,968,861 | 17,048,251 | 17,031,497 | 17,107,660 | 17,286,524 | ||||||||||||
| Current liabilities: | |||||||||||||||||||||
| Accounts payable | 113,288 | 94,503 | 118,168 | 106,172 | 83,037 | 113,579 | 87,317 | 46,920 | 85,126 | ||||||||||||
| Unearned revenue | 1,528,343 | 1,514,442 | 1,497,166 | 1,585,257 | 1,602,526 | 1,709,938 | 1,663,183 | 1,573,311 | 1,580,235 | ||||||||||||
| Other liabilities | 998,472 | 898,909 | 994,308 | 1,045,134 | 999,071 | 1,000,760 | 948,829 | 994,883 | 1,029,893 | ||||||||||||
| Income taxes payable | 49,350 | 19,347 | 49,888 | 52,585 | 27,935 | 41,905 | 41,518 | 39,885 | 68,676 | ||||||||||||
| Current bank credit lines, loan facilities and notes | 529,762 | 29,762 | 29,762 | 29,762 | 29,762 | 79,762 | 130,150 | 105,150 | 135,150 | ||||||||||||
| Total current liabilities | 3,219,215 | 2,556,963 | 2,689,292 | 2,818,910 | 2,742,331 | 2,945,944 | 2,870,997 | 2,760,149 | 2,899,080 | ||||||||||||
| Non-current liabilities: | |||||||||||||||||||||
| Non-current bank credit lines, loan facilities and notes, net | 2,878,547 | 3,384,488 | 3,390,438 | 3,402,368 | 3,408,157 | 3,419,734 | 3,911,522 | 4,206,936 | 4,353,534 | ||||||||||||
| Lease liabilities | 125,110 | 132,713 | 138,354 | 145,714 | 145,464 | 145,542 | 121,424 | 129,079 | 133,048 | ||||||||||||
| Non-current other liabilities | 99,490 | 97,057 | 85,713 | 50,157 | 48,372 | 45,988 | 41,661 | 39,438 | 46,177 | ||||||||||||
| Non-current income taxes payable | 105,832 | 100,916 | 129,529 | 201,135 | 195,778 | 188,876 | 242,972 | 241,410 | 243,813 | ||||||||||||
| Deferred tax liability | 744,450 | 775,066 | 788,816 | 818,329 | 843,633 | 869,520 | 883,887 | 934,208 | 957,019 | ||||||||||||
| Commitments and contingencies | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Total Liabilities | 7,172,644 | 7,047,203 | 7,222,142 | 7,436,613 | 7,383,735 | 7,615,604 | 8,072,463 | 8,311,220 | 8,632,671 | ||||||||||||
| Shareholders' Equity: | |||||||||||||||||||||
| 76,567,325 shares issued and outstanding at December 31, 2025, (2024: 80,756,860 and 2023: 82,495,086) | 6,290 | 6,390 | 6,505 | 6,703 | 6,720 | 6,711 | 6,688 | 6,676 | 6,662 | ||||||||||||
| Additional paid-in capital | 7,100,059 | 7,054,324 | 7,037,344 | 7,011,547 | 6,988,736 | 6,970,079 | 6,924,073 | 6,891,494 | 6,867,887 | ||||||||||||
| Other undenominated capital | 1,606 | 1,506 | 1,389 | 1,184 | 1,162 | 1,162 | 1,162 | 1,162 | 1,162 | ||||||||||||
| Accumulated other comprehensive loss | (86,944) | (68,763) | (173,191) | (110,062) | (179,559) | (166,462) | (190,190) | (156,528) | (159,896) | ||||||||||||
| Retained earnings | 2,313,835 | 2,561,630 | 2,628,808 | 2,865,127 | 2,768,067 | 2,621,157 | 2,217,301 | 2,053,636 | 1,938,038 | ||||||||||||
| Total Shareholders' Equity | 9,334,846 | 9,555,087 | 9,500,855 | 9,774,499 | 9,585,126 | 9,432,647 | 8,959,034 | 8,796,440 | 8,653,853 | ||||||||||||
| Total Liabilities and Shareholders' Equity | 16,507,490 | 16,602,290 | 16,722,997 | 17,211,112 | 16,968,861 | 17,048,251 | 17,031,497 | 17,107,660 | 17,286,524 | ||||||||||||
| Adjustments | |||||||||||||||||||||
| Current assets: | |||||||||||||||||||||
| Cash and cash equivalents | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Available for sale investments | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||
| Accounts receivable, net of allowance for credit losses | 0 | 0 | 0 | 0 | (990) | (159,949) | 0 | 0 | 0 | ||||||||||||
| Unbilled services (unbilled revenue) | (62,959) | (71,539) | (95,569) | (242,338) | (209,429) | (43,574) | (113,431) | (82,713) | (93,848) | ||||||||||||
| Other receivables | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Prepayments and other current assets | (1,925) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Income taxes receivable | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Total current assets | (64,884) | (71,539) | (95,569) | (242,338) | (210,419) | (203,523) | (113,431) | (82,713) | (93,848) | ||||||||||||
| Non-current assets: | |||||||||||||||||||||
| Property, plant and equipment, net | (12,898) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Goodwill | (198,948) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Intangible assets, net | (86,739) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Operating right-of-use assets | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Other receivables | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Income taxes receivable | 11,395 | 11,395 | 11,395 | 13,682 | 14,994 | 4,155 | (2,651) | (3,576) | (4,352) | ||||||||||||
| Deferred tax asset | 2,456 | 2,456 | 2,456 | (2,306) | (2,463) | (1,431) | 1,398 | 876 | 439 | ||||||||||||
| Investments in equity | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Total Assets | (349,618) | (57,688) | (81,718) | (230,962) | (197,888) | (200,799) | (114,684) | (85,413) | (97,761) | ||||||||||||
| Current liabilities: | |||||||||||||||||||||
| Accounts payable | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Unearned revenue | 18,544 | 980 | (1,319) | (107,305) | (58,251) | (124,244) | (99,235) | (79,908) | (99,960) | ||||||||||||
| Other liabilities | (7,248) | (7,248) | (7,248) | (7,248) | (7,248) | (7,248) | (7,248) | (7,248) | (7,248) | ||||||||||||
| Income taxes payable | 1,448 | 1,935 | 748 | 0 | 0 | 0 | (10,703) | (10,703) | (10,703) | ||||||||||||
| Current bank credit lines, loan facilities and notes | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Total current liabilities | 12,744 | (4,333) | (7,819) | (114,553) | (65,499) | (131,492) | (117,186) | (97,859) | (117,911) | ||||||||||||
| Non-current liabilities: | |||||||||||||||||||||
| Non-current bank credit lines, loan facilities and notes, net | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Lease liabilities | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Non-current other liabilities | (752) | (752) | (752) | (752) | (752) | (752) | (752) | (752) | (752) | ||||||||||||
| Non-current income taxes payable | 1,710 | 1,710 | 1,710 | 2,093 | 2,313 | 871 | 0 | 0 | 0 | ||||||||||||
| Deferred tax liability | (22,342) | 127 | 127 | (1,358) | (1,418) | (1,028) | (482) | (302) | (151) | ||||||||||||
| Commitments and contingencies | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Total Liabilities | (8,640) | (3,248) | (6,734) | (114,570) | (65,356) | (132,401) | (118,420) | (98,913) | (118,814) | ||||||||||||
| Shareholders' Equity: | |||||||||||||||||||||
| 76,567,325 shares issued and outstanding at December 31, 2025, (2024: 80,756,860 and 2023: 82,495,086) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Additional paid-in capital | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Other undenominated capital | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Accumulated other comprehensive loss | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
| Retained earnings | (340,978) | (54,440) | (74,984) | (116,392) | (132,532) | (68,398) | 3,736 | 13,500 | 21,053 | ||||||||||||
| Total Shareholders' Equity | (340,978) | (54,440) | (74,984) | (116,392) | (132,532) | (68,398) | 3,736 | 13,500 | 21,053 | ||||||||||||
| Total Liabilities and Shareholders' Equity | $ (349,618) | $ (57,688) | $ (81,718) | $ (230,962) | $ (197,888) | $ (200,799) | $ (114,684) | $ (85,413) | $ (97,761) |