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Segments and Disaggregation of Revenue - Schedule of Reconciliation of Reportable Segment Adjusted EBITDA to Loss Before Taxes (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Reportable segment adjusted EBITDA | $ 550 | $ 387
Unallocated corporate overhead | (36) | (35)
Depreciation and amortization | (297) | (297)
Share-based compensation expense | (41) | (46)
Transaction fees and associated costs | (29) | (3)
Restructuring and integration costs | (23) | (21)
Other expense, net | (174) | (45)
Interest expense, net | (112) | (92)
Loss before income taxes | (162) | (152)
US [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Reportable segment adjusted EBITDA | 26 | (53)
UK [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Reportable segment adjusted EBITDA | 268 | 206
Australia [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Reportable segment adjusted EBITDA | 83 | 85
International Segement [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Reportable segment adjusted EBITDA | 173 | 149
Segment Reconciling Items [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Interest expense, net | $ (112) | $ (92)

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