Segment, Geographic and Revenue Information - Income from Continuing Operations before Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information
Income from continuing operations before income taxes	$ 19,668	$ 14,418	$ 11,301
U.S.
Segment Reporting Information
Income from continuing operations before income taxes	14,082	10,027	9,464
Non-U.S.
Segment Reporting Information
Income from continuing operations before income taxes	$ 5,586	$ 4,391	$ 1,837