Leases - Schedule of Operating ROU Assets and Lease Liabilities (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Total lease liabilities	$ 289
Other assets
Lessee, Lease, Description [Line Items]
ROU assets	254
Accrued expenses and other current liabilities
Lessee, Lease, Description [Line Items]
Current lease liabilities	60
Other liabilities
Lessee, Lease, Description [Line Items]
Non-current lease liabilities	$ 229