Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended					6 Months Ended	9 Months Ended	12 Months Ended
		Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2023	Sep. 30, 2023	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Numerator:
Net Earnings		$ 880	$ 882	$ 828	$ 984	$ 974	$ 1,958	$ 2,786	$ 3,470	[1],[2]	$ 3,668	[1],[2]	$ 4,114	[1],[3]
Denominator:
Average Common Shares Outstanding (in shares)	[1]								1,939		2,008		2,136
Other Potentially Dilutive Common Shares (in shares)									4		5		5
Average Common Shares Outstanding, Assuming Dilution (in shares)	[1]								1,943		2,013		2,141
Net Earnings Per Share, Basic (in dollars per share)		$ 0.45	$ 0.45	$ 0.42	$ 0.49	$ 0.47	$ 0.96	$ 1.38	$ 1.79	[1]	$ 1.83	[1]	$ 1.93	[1]
Net Earnings Per Share, Assuming Dilution (in dollars per share)		$ 0.45	$ 0.45	$ 0.41	$ 0.49	$ 0.47	$ 0.96	$ 1.37	$ 1.79	[1]	$ 1.82	[1]	$ 1.92	[1]

[1] See Note 20, Revision of Prior Period Financial Statements

[2] See Note 20, Revision of Prior Period Financial Statements.

[3] See Note 20, Revision of Prior Period Financial Statements.