Segment Information (Sales By Major Product Group) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Sales	$ 22,284	$ 17,911	$ 17,049
Analytical and physical instrumentation
Sales	2,443	2,464	2,437
Research and medical products
Sales	17,979	13,512	12,686
Product Identification
Sales	$ 1,862	$ 1,935	$ 1,926

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details