Leases (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Leases [Abstract]
Lease, cost	$ 26	$ 56
Capitalized operating leases	17	36
Short-term lease and variable lease payment	9	20
Operating lease, right-of-use asset	213	213
Operating lease, liability, current	51	51
Operating lease, liability, noncurrent	$ 133	$ 133
Operating lease, weighted average remaining lease term	4 years 9 months 18 days	4 years 9 months 18 days
Operating lease, weighted average discount rate, percent	2.63%	2.63%