Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 133	$ 145
Accumulated amortization	(99)	(71)
Net carrying amount	$ 34	$ 74
Weighted average remaining life (in years)	4 years 2 months 12 days	4 years 8 months 12 days
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 86	$ 90
Accumulated amortization	(65)	(45)
Net carrying amount	$ 21	$ 45
Weighted average remaining life (in years)	5 years 6 months	5 years 10 months 24 days
Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 39	$ 46
Accumulated amortization	(30)	(23)
Net carrying amount	$ 9	$ 23
Weighted average remaining life (in years)	1 year 9 months 18 days	2 years 10 months 24 days
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 8	$ 8
Accumulated amortization	(4)	(2)
Net carrying amount	$ 4	$ 6
Weighted average remaining life (in years)	2 years 7 months 6 days	3 years 7 months 6 days
Other
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		$ 1
Accumulated amortization		(1)
Net carrying amount		$ 0
Weighted average remaining life (in years)		2 years 9 months 18 days