Retirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined Contribution Plan, Cost	$ 152	$ 146	$ 143
Pension Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined Contribution Plan, Cost	432	398	444
Assumptions used to determine net benefit cost [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement, Curtailment, and Other	$ 244	367	361
Pension Plan | Global Redesign
Assumptions used to determine net benefit cost [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement, Curtailment, and Other		$ 268
Defined Benefit Plan, Other Cost (Credit)			415
Pension Plan | One-Time Contribution
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined Contribution Plan, Cost			33
Other Postretirement Benefit Plan, Defined Benefit
Weighted average assumptions [Abstract]
Discount Rate	2.97%	2.62%
Average rate of increase in compensation	3.46%	3.44%
Assumptions used to determine net benefit cost [Abstract]
Expected long-term rate of return on assets	0.00%	0.00%
Average rate of increase in compensation	3.44%	3.44%
Defined Benefit Plan, Other Cost (Credit)	$ 0	$ 0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (212)	$ 754	735
Other Postretirement Benefit Plan Service Cost [Member]
Assumptions used to determine net benefit cost [Abstract]
Discount Rate	3.14%	3.57%
Other Postretirement Benefit Plan Interest Cost [Member]
Assumptions used to determine net benefit cost [Abstract]
Discount Rate	1.96%	2.85%
U.S. Plans | Pension Plan
Weighted average assumptions [Abstract]
Discount Rate	2.91%	2.56%
Average rate of increase in compensation	3.50%	3.50%
Assumptions used to determine net benefit cost [Abstract]
Expected long-term rate of return on assets	6.00%	6.50%
Average rate of increase in compensation	3.50%	3.50%
Defined Benefit Plan, Other Cost (Credit)	$ 19	$ 35	22
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	(70)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (1,437)	$ (563)	(706)
U.S. Plans | United States Pension Plan US Entity Service Cost [Member]
Assumptions used to determine net benefit cost [Abstract]
Discount Rate	3.02%	3.55%
U.S. Plans | United States Pension Plan US Entity Interest Cost [Member]
Assumptions used to determine net benefit cost [Abstract]
Discount Rate	2.00%	2.88%
Non-U.S. Plans | Pension Plan
Weighted average assumptions [Abstract]
Discount Rate	1.75%	1.23%
Average rate of increase in compensation	3.19%	3.34%
Assumptions used to determine net benefit cost [Abstract]
Expected long-term rate of return on assets	3.42%	3.67%
Average rate of increase in compensation	3.34%	3.37%
Defined Benefit Plan, Other Cost (Credit)	$ 156	$ 226	398
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(61)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(3,216)	$ 836	$ 2,596
Non-U.S. Plans | Pension Plan | Global Redesign
Assumptions used to determine net benefit cost [Abstract]
Defined Benefit Plan, Other Cost (Credit)	$ 156
Non-U.S. Plans | Foreign Pension Plan Service Cost [Member]
Assumptions used to determine net benefit cost [Abstract]
Discount Rate	1.44%	1.75%
Non-U.S. Plans | Foreign Pension Plan Interest Cost [Member]
Assumptions used to determine net benefit cost [Abstract]
Discount Rate	1.06%	1.46%