Income Taxes - Schedule of Income Taxes Paid, Net of Refunds Received (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items]
U.S. Federal Taxes	$ 65	$ 76	$ 130
Foreign Taxes
Total	134	124	252
Illinois
State and Local Taxes
State and Local Taxes	1	9	5
Kentucky
State and Local Taxes
State and Local Taxes	8	11	3
Other States
State and Local Taxes
State and Local Taxes	7	10	8
United Kingdom
Foreign Taxes
Foreign taxes	8	0	74
Singapore
Foreign Taxes
Foreign taxes	17	3	16
Other Foreign
Foreign Taxes
Foreign taxes	$ 28	$ 15	$ 16

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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