Revenue - Schedule of Contract Balances (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Billed Receivable, Current	$ 1,744	$ 1,831
Unbilled Receivable, Current	452	434
Contract asset, Current	234	356
Accounts receivable, net	2,430	2,621
Non-current accounts receivable, net	33	30
Contract asset, Noncurrent	172	105
Deferred revenue	$ 558	$ 538

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent.

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Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

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