Segment Reporting Segment Asset Reconciliation (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Segment Reporting Information [Line Items]
Total Assets	$ 41,464	$ 42,996	$ 44,189
Segments
Segment Reporting Information [Line Items]
Total Assets	37,221	37,736	39,294
Corporate
Segment Reporting Information [Line Items]
Total Assets	$ 4,243	$ 5,260	$ 4,895