Acquisitions and Dispositions - Discontinued Operations Aerospace (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Feb. 16, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Business dispositions, net of cash sold			$ 5,422		$ 759
Effective income tax rate			21.00%	21.00%	21.00%
Effective income tax rate increased by U.S. state and local taxes			2.40%	3.30%	3.40%
Effective income tax rate reduction for federal tax credits				35.40%	12.30%
Discontinued Operations, Disposed of by Sale | Aerospace Business
Schedule of Equity Method Investments [Line Items]
Pre-tax gain	$ 20			$ (20)
Business dispositions, net of cash sold			$ 5,420
Consideration for the sale of business	$ 5,600
Preliminary concessions		$ 60
Effective income tax rates on discontinued operations			23.10%	(11.50%)	12.30%