Segment Reporting Segment Asset Reconciliation (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Segment Reporting Information [Line Items]
Total Assets	$ 43,625	$ 42,996	$ 45,500
Segments
Segment Reporting Information [Line Items]
Total Assets	39,609	37,736	41,550
Corporate
Segment Reporting Information [Line Items]
Total Assets	$ 4,016	$ 5,260	$ 3,950