Leases - Schedule of Supplemental Information Related to Operating Leases (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of operating lease liabilities:
Operating cash flows from operating leases	$ (12)
Supplemental non-cash information:
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 9
Weighted-average remaining lease term of operating leases	6 years 4 months 24 days
Weighted-average discount rate of operating leases	5.34%