Revenue Recognition - Summary of Balances of Accounts Receivables and Contract Assets from Contracts with Customers (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Accounts receivable	$ 70	$ 176
Contract assets	13	7
Total	$ 83	$ 183

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant