Leases (Details Textuals) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Additional operating leases	$ 18	$ 16
Minimum
Lessee, Lease, Description [Line Items]
Operating lease terms	1 year
Additional operating lease terms	3 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease terms	42 years
Additional operating lease terms	6 years