Leases (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Expected future lease payments for leases not yet commenced	$ 275
Total lease receivables	$ 303
Real Property
Lessee, Lease, Description [Line Items]
Lease renewal term	5 years
Minimum
Lessee, Lease, Description [Line Items]
Noncancelable lease term of leases not yet commenced	5 years
Minimum | Facilities
Lessee, Lease, Description [Line Items]
Typical remaining lease terms	1 year
Minimum | Equipment
Lessee, Lease, Description [Line Items]
Typical remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Noncancelable lease term of leases not yet commenced	20 years
Maximum | Facilities
Lessee, Lease, Description [Line Items]
Typical remaining lease terms	15 years
Maximum | Equipment
Lessee, Lease, Description [Line Items]
Typical remaining lease terms	6 years