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Summary of Significant Accounting Policies - Narrative (Details)					12 Months Ended
	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 02, 2018 segment	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Product Information [Line Items]
Contract with customer, asset, after allowance for credit loss, current			$ 81,000,000			$ 81,000,000
Contract with customer, asset, after allowance for credit loss, noncurrent	$ 0				$ 0
Number of operating segments \| segment				2	2
Production parts average payment terms					30 days
Capitalized contract cost, impairment loss					$ 0
Capitalized contract costs			$ 12,000,000			12,000,000
Research and development, reimbursements from customers						202,000,000	$ 103,000,000	$ 95,000,000
Foreign currency transaction gain (loss), realized					$ (8,000,000)	$ 2,000,000	$ (2,000,000)
Settlement payment		$ 20,000,000
Minimum
Product Information [Line Items]
Finite-lived intangible asset, useful life					5 years
Maximum
Product Information [Line Items]
Finite-lived intangible asset, useful life					10 years
Sales Revenue \| Customer Concentration Risk
Product Information [Line Items]
Concentration risk, percentage					10.00%
Four Largest Customers \| Sales Revenue \| Customer Concentration Risk
Product Information [Line Items]
Concentration risk, percentage					53.00%	59.00%	58.00%
Four Largest Customers \| Accounts Receivable \| Customer Concentration Risk
Product Information [Line Items]
Concentration risk, percentage	40.00%		39.00%