Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings	$ (336,637)	$ (303,082)	$ (327,878)
Increase to income tax expense	$ 3,874	3,345
Percentage increase in effective tax rate due to accounting standard adopted	2.00%
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings	$ (342,414)	$ (306,208)	(332,901)	$ (296,456)
Cumulative effect of change in accounting principles
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to income tax expense	$ 450
Cumulative effect of change in accounting principles | Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings			$ 161	$ (449)