Amounts in Paragraphs - Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 30, 2021	Dec. 07, 2020
Summary of Significant Accounting Policies (Amounts in paragraphs)
Research and development expenses	$ 1,100	$ 1,100	$ 953
Research and Development as a Percent of Sales	3.20%	2.90%	2.80%
Inventory for Long-term Contracts or Programs, General and Administrative Costs Included in Inventory	$ 44	$ 41
Cash surrender value of life insurance	$ 440	419
Stock plans, vesting period	3 years
Disposal Group, Including Discontinued Operation, Consideration				$ 3,400	$ 3,400
Pre-tax gain on sale of business	$ 2,000
Revenue from Sale of Equipment to a Customer		444
Proceeds from sale of equipment to a customer	84	205	$ 0
Remaining Cash to be Collected From Sale of Property, Plant, and Equipment	155
Non-cash Investing Activities from Landlord Funded Leasehold Activities	150
Capital Expenditures Incurred but Not yet Paid	$ 91	$ 72	$ 166