Segment information - Summary of Information About Geographical Areas - Long-lived assets and other intangible assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Segment information - Consolidated Balance Sheet
Total long-lived assets by geographical area	$ 19,133	$ 18,943
Republic of Ireland
Segment information - Consolidated Balance Sheet
Total long-lived assets by geographical area	421	487
United Kingdom
Segment information - Consolidated Balance Sheet
Total long-lived assets by geographical area	1,786	1,691
United States
Segment information - Consolidated Balance Sheet
Total long-lived assets by geographical area	10,821	10,916
Other
Segment information - Consolidated Balance Sheet
Total long-lived assets by geographical area	$ 6,105	$ 5,849