Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 01, 2019	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases		$ 204,909
Operating cash flows for finance leases		526
Financing cash flows for finance leases		183
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases		1,202,165
Finance leases		$ 9,102
Accounting Standards Update 2016-02
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$ 1,057,000