Annual report [Section 13 and 15(d), not S-K Item 405]

Summary of Significant Accounting Policies - Revenue recognition - Disaggregation of revenue - QuintEvents (Details)

v3.25.4
Summary of Significant Accounting Policies - Revenue recognition - Disaggregation of revenue - QuintEvents (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disaggregation of Revenue [Line Items]                      
Revenue $ 1,609 $ 1,085 $ 1,341 $ 447 $ 1,167 $ 911 $ 988 $ 587 $ 4,482 $ 3,653 $ 3,572
Quint Events, LLC                      
Disaggregation of Revenue [Line Items]                      
Revenue                 $ 381 $ 340