Segment Information and Concentrations - Revenue by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Revenue from External Customer [Line Items]
Total revenue	$ 1,544	$ 1,503
Recurring revenue
Revenue from External Customer [Line Items]
Total revenue	874	802
All other products and services
Revenue from External Customer [Line Items]
Total revenue	$ 670	$ 701

Amount, including 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