Leases - Schedule of Cash Flow and Other Information (Details)	6 Months Ended
	Jun. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for operating leases	$ 10,000,000
Operating cash flows used for finance leases	1,000,000
Financing cash flows used for finance leases	1,000,000
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	32
Finance leases	$ 33
Weighted-average remaining lease term
Operating Leases	8 years
Finance Leases	11 years
Weighted-average discount rate
Operating leases	3.70%
Finance leases	4.90%