| Goodwill and Intangible Assets, Net The changes in the carrying amount of goodwill during the six months ended June 30, 2026 were as follows (in millions): | | | | | | | | | | | Total | | | | | Balance as of December 31, 2025 | | $ | 5,519 | | | Goodwill measurement period adjustments | | 41 | | | Acquisition | | 34 | | | Effects of foreign currency translation | | (99) | | | Balance as of June 30, 2026 | | $ | 5,495 | |
Intangible assets, net consisted of the following as of December 31, 2025 (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | Weighted-average Remaining Useful Life (in years) | | Gross Carrying Value | | Accumulated Amortization | | Net Carrying Value | | | | | | | | | | Existing technology | 3.1 | | $ | 622 | | | $ | (222) | | | $ | 400 | | | Merchant relationships | 9.3 | | 854 | | | (122) | | | 732 | | | Rider relationships | 1.8 | | 14 | | | (2) | | | 12 | | | Customer relationships | 6.5 | | 798 | | | (169) | | | 629 | | | Trade name and trademarks | 8.4 | | 602 | | | (119) | | | 483 | | | Assembled workforce in asset acquisitions | 1.3 | | 10 | | | (6) | | | 4 | | | Balance as of December 31, 2025 | | | $ | 2,900 | | | $ | (640) | | | $ | 2,260 | |
Intangible assets, net consisted of the following as of June 30, 2026 (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | Weighted-average Remaining Useful Life (in years) | | Gross Carrying Value | | Accumulated Amortization | | Net Carrying Value | | | | | | | | | | Existing technology | 2.8 | | $ | 620 | | | $ | (301) | | | $ | 319 | | | Merchant relationships | 8.9 | | 836 | | | (160) | | | 676 | | | Rider relationships | 1.3 | | 13 | | | (5) | | | 8 | | | Customer relationships | 6.2 | | 787 | | | (230) | | | 557 | | | Trade name and trademarks | 7.9 | | 589 | | | (146) | | | 443 | | | Assembled workforce in asset acquisitions | 0.8 | | 10 | | | (8) | | | 2 | | | Balance as of June 30, 2026 | | | $ | 2,855 | | | $ | (850) | | | $ | 2,005 | |
Amortization expense associated with intangible assets was $32 million and $114 million for the three months ended June 30, 2025 and 2026, respectively. Amortization expense associated with intangible assets was $63 million and $228 million for the six months ended June 30, 2025 and 2026, respectively. The estimated future amortization expense of intangible assets as of June 30, 2026 is as follows (in millions): | | | | | | | | | | Year Ending December 31, | | Amortization Expense | | | | | Remainder of 2026 | | $ | 226 | | | 2027 | | 420 | | | 2028 | | 312 | | | 2029 | | 263 | | | 2030 | | 171 | | | Thereafter | | 613 | | | Total estimated future amortization expense | | $ | 2,005 | |
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