Segment Information - Revenue and Tangible Long-lived Assets by Geographical Areas (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		$ 2,223	$ 2,341
Long-Lived Assets	[1]	1,154		$ 1,146
Ireland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		35	35
Long-Lived Assets	[1]	8		8
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		932	1,101
Long-Lived Assets	[1]	294		307
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		451	424
Long-Lived Assets	[1]	500		490
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		805	781
Long-Lived Assets	[1]	352		341
Total Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		2,188	$ 2,306
Long-Lived Assets	[1]	$ 1,146		$ 1,138

[1] Tangible long-lived assets consist of fixed assets and right-of-use (‘ROU’) assets.