Retirement Benefits (Schedule of Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
U.S. | Pension  Benefits
Defined Benefit Plan Disclosure [Line Items]
Total recognized in net periodic benefit cost and other comprehensive (income) loss	$ (722)	$ 272	$ 160
U.S. | Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Total recognized in net periodic benefit cost and other comprehensive (income) loss	0	2	2
Non-U.S. | Pension  Benefits
Defined Benefit Plan Disclosure [Line Items]
Total recognized in net periodic benefit cost and other comprehensive (income) loss	(745)	261	311
Non-U.S. | Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Total recognized in net periodic benefit cost and other comprehensive (income) loss	$ (2)	$ 13	$ 5