Other Comprehensive Income (Loss) - Narrative (Details) - USD ($) $ in Millions	3 Months Ended													6 Months Ended	9 Months Ended				12 Months Ended
	Sep. 30, 2024		Jun. 30, 2024		Mar. 31, 2024		Dec. 31, 2023	Sep. 30, 2023		Jun. 30, 2023		Mar. 31, 2023		Jun. 30, 2023	Sep. 30, 2024		Sep. 30, 2023		Dec. 31, 2023	Dec. 31, 2022
Equity [Abstract]
Total comprehensive earnings, net of tax	$ 895	[1]	$ 966	[1]	$ 886	[1]	$ 997	$ 846	[2]	$ 980	[2]	$ 976	[2]	$ 1,956	$ 2,747	[3]	$ 2,802	[3]	$ 3,799	$ 4,080

[1] See Note 11, Revision of Prior Period Financial Statements.

[2] See Note 11, Revision of Prior Period Financial Statements.

[3] See Note 11, Revision of Prior Period Financial Statements.