Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Lease, Cost

Lease cost recognized in our consolidated statements of operations is summarized as follows (in millions):

	Year Ended December 31,
	2019		2020
Operating lease cost	$	3,669	$	5,019
Finance lease cost:
Amortization of lease assets	10,094		8,452
Interest on lease liabilities	695		617
Finance lease cost	10,789		9,069
Variable lease cost	966		1,238
Total lease cost	$	15,424	$	15,326

Other Operating and Finance Lease Information

Other information about lease amounts recognized in our consolidated financial statements is as follows:

	December 31, 2019		December 31, 2020
Weighted-average remaining lease term – operating leases	11.5		11.3
Weighted-average remaining lease term – finance leases	5.5		6.2
Weighted-average discount rate – operating leases	3.1	%	2.5	%
Weighted-average discount rate – finance leases	2.7	%	2.1	%

Operating and Finance Lease Liability Reconciliation

Our lease liabilities were as follows (in millions):

	December 31, 2019
	Operating Leases		Finance Leases		Total
Gross lease liabilities	$	31,963	$	28,875	$	60,838
Less: imputed interest	(6,128)		(1,896)		(8,024)
Present value of lease liabilities	25,835		26,979		52,814
Less: current portion of lease liabilities	(3,139)		(9,884)		(13,023)
Total long-term lease liabilities	$	22,696	$	17,095	$	39,791

	December 31, 2020
	Operating Leases		Finance Leases		Total
Gross lease liabilities	$	46,164	$	30,437	$	76,601
Less: imputed interest	(7,065)		(2,003)		(9,068)
Present value of lease liabilities	39,099		28,434		67,533
Less: current portion of lease liabilities	(4,586)		(10,374)		(14,960)
Total long-term lease liabilities	$	34,513	$	18,060	$	52,573