Leases - Summary of Location and Amounts Related to Finance Leases (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Finance lease right-of-use assets, Property, plant and equipment, net	$ 42
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentMember
Finance lease liabilities, Current portion of long-term debt	$ 5
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherCurrentLiabilitiesMember
Finance lease liabilities, Long-term debt	$ 25
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtMember