Revenue - Summary of Information About Trade Receivables, Contract Assets, and Deferred Revenue (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Receivables from contracts with customers [abstract]
Trade receivables	$ 474	$ 452
Contract assets	290	258	$ 198
Deferred revenue	$ 1,506	$ 1,357

The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer, when that right is conditioned on something other than the passage of time (for example, the entity’s future performance).

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- Definition

The amount of current trade receivables. [Refer: Trade receivables]

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- Definition

The amount of liability representing income that has been received but is not yet earned. [Refer: Revenue]

+ References

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No definition available.

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