Segment Reporting Segment Asset Reconciliation (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Segment Reporting [Abstract]
Segment Assets	$ 41,550	$ 37,049	$ 38,290
Corporate Assets	3,950	5,569	4,343
Total Assets	$ 45,500	$ 42,618	$ 42,633