Leases (Details Textuals) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Additional operating leases	$ 18	$ 16
Lessee, Finance Lease, Lease Not yet Commenced, Liability	$ 2	$ 2
Minimum
Lessee, Lease, Description [Line Items]
Operating lease terms	1 year
Additional operating lease terms	2 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease terms	43 years
Additional operating lease terms	6 years