Recent Accounting Pronouncements - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Recent accounting pronouncements
Reduction in equity	$ (4,729)	$ (3,803)	[1],[2]	$ (4,837)	[1]	$ (6,131)
Adjustment
Recent accounting pronouncements
Reduction in equity		(190)		1,104		1,900
Retained Earnings
Recent accounting pronouncements
Reduction in equity	(21,905)	(19,918)	[1]	(17,322)	[1]	(15,292)
Retained Earnings | Adjustment
Recent accounting pronouncements
Reduction in equity						900
Accumulated Other Comprehensive Income (Loss)
Recent accounting pronouncements
Reduction in equity	$ 1,766	$ 2,546	[1]	$ 642	[1]	(893)
Accumulated Other Comprehensive Income (Loss) | Adjustment
Recent accounting pronouncements
Reduction in equity						$ 1,000

[1] Certain prior period amounts have been restated. See Note 3 for more information.

[2] Certain prior period amounts have been restated. See Note 3 for more information.