Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Selected Quarterly Financial Information [Abstract]
Total net revenues	$ 3,992	$ 3,925	$ 3,876	$ 3,742	$ 3,663	$ 3,484	$ 3,486	$ 3,625	$ 15,535	$ 14,258	[1]	$ 13,377	[1]
Pretax income	494	1,117	1,127	496	817	1,335	773	1,006	3,234	3,931	[1]	4,185	[1]
Net income	$ 377	$ 872	$ 890	$ 417	$ 649	$ 1,061	$ 614	$ 825	$ 2,556	$ 3,149	[1],[2]	$ 3,417	[1],[2]
Earnings per share
Basic (in dollars per share)	$ 3.64	$ 8.31	$ 8.36	$ 3.86	$ 5.96	$ 9.60	$ 5.47	$ 7.26	$ 24.18	$ 28.29	[1]	$ 29.13	[1]
Diluted (in dollars per share)	$ 3.57	$ 8.14	$ 8.21	$ 3.79	$ 5.83	$ 9.41	$ 5.37	$ 7.10	$ 23.71	$ 27.70	[1]	$ 28.48	[1]
Weighted average common shares oustanding
Basic: Weighted-average common shares outstanding (in shares)	103.5	104.9	106.4	107.9	108.9	110.5	112.3	113.7	105.7	111.3		117.3
Diluted: Weighted-average common shares outstanding (in shares)	105.7	107.1	108.4	110.0	111.4	112.7	114.4	116.2	107.8	113.7		120.0
Cash dividends declared per common share	$ 1.35	$ 1.35	$ 1.35	$ 1.25	$ 1.25	$ 1.25	$ 1.25	$ 1.13

[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.