Components of Lease Expense (Table) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 13	$ 12	$ 29	$ 23
Short-term lease cost	9	7	13	12
Variable operating lease cost	1	2	2	3
Operating cash flows from operating leases	(12)	(11)	(28)	(22)
Right-of-Use asset obtained in exchange for new operating lease liability	$ 4	$ 4	$ 21	$ 17
Weighted-average remaining lease term (years) - operating leases	10 years	11 years	10 years	11 years
Weighted-average discount rate - operating leases	4.10%	4.50%	4.10%	4.50%