Business, Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) Segment	Jan. 01, 2024 USD ($)	Dec. 31, 2023 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of segments | Segment	6
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings, decrease	$ (41,765)		$ (40,146)
Cumulative Effect, Period of Adoption, Adjustment | Pro Forma | Accounting Standards Update 2023-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings, decrease		$ 219