Employee Benefit Plans (Schedule of Pension Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss arising during the period	$ (3,246)	$ 202	$ 543
Current year prior service cost (credit)	59	(2,095)	6
Amortization of prior service cost	(258)	(373)	$ (228)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss arising during the period	(3,158)	155
Amortization of actuarial gain	(435)	(337)
Current year prior service cost (credit)	59	(2,088)
Amortization of prior service cost	168	(51)
Net settlement and curtailment	(17)	(34)
Separation of Carrier and Otis	0	(763)
Other	(6)	81
Total recognized in other comprehensive (income) loss	(3,389)	(3,037)
Net recognized in net periodic benefit (income) cost and other comprehensive loss	$ (4,804)	$ (3,466)