Revenue from Contracts with Customers - Schedule of Contract Balances (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 1,412	$ 1,293
Contract assets	1,046	1,012
Contract liabilities	1,449	1,263
Non-current contract liabilities	$ 274	$ 214

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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