We have entered into various non-cancellable operating and finance lease agreements for certain of our offices, manufacturing and warehouse facilities, retail and service locations, equipment, vehicles, and solar energy systems, worldwide. We determine if an arrangement is a lease, or contains a lease, at inception and record the leases in our financial statements upon lease commencement, which is the date when the underlying asset is made available for use by the lessor.

Our leases, where we are the lessee, often include options to extend the lease term for up to 10 years. Some of our leases also include options to terminate the lease prior to the end of the agreed upon lease term. For purposes of calculating lease liabilities, lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise such options.

Lease expense for operating lease payments is recognized on a straight-line basis over the lease term. Certain operating leases provide for annual increases to lease payments based on an index or rate. We calculate the present value of future lease payments based on the index or rate at the lease commencement date for new leases commencing after January 1, 2019. For historical leases, we used the index or rate as of the adoption date. Differences between the calculated lease payment and actual payment are expensed as incurred. Lease expense for finance lease payments is recognized as amortization expense of the finance lease ROU asset and interest expense on the finance lease liability over the lease term.

The balances for the operating and finance leases where we are the lessee are presented as follows (in millions) within our consolidated balance sheet:

	September 30, 2019
Operating leases:
Operating lease right-of-use assets	$	1,234

Accrued liabilities and other	$	223
Other long-term liabilities		1,028
Total operating lease liabilities	$	1,251

Finance leases:
Solar energy systems, net	$	31
Property, plant and equipment, net		1,570
Total finance lease assets	$	1,601

Current portion of long-term debt and finance leases	$	387
Long-term debt and finance leases, net of current portion		1,217
Total finance lease liabilities	$	1,604

The components of lease expense are as follows (in millions) within our consolidated statements of operations:

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
Operating lease expense:
Operating lease expense (1)	$	110	$	317

Finance lease expense:
Amortization of leased assets	$	78	$	210
Interest on lease liabilities		27		78
Total finance lease expense	$	105	$	288

Total lease expense	$	215	$	605

	September 30, 2019
Weighted-average remaining lease term:
Operating leases	6.6 years
Finance leases	4.2 years

Weighted-average discount rate:
Operating leases		6.5	%
Finance leases		6.6	%

Supplemental cash flow information related to leases where we are the lessee is as follows (in millions):

	Nine Months Ended
	September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	$	262
Operating cash outflows from finance leases (interest payments)	$	76
Financing cash outflows from finance leases	$	223
Leased assets obtained in exchange for finance lease liabilities	$	497
Leased assets obtained in exchange for operating lease liabilities	$	172

As of September 30, 2019, the maturities of our operating and finance lease liabilities (excluding short-term leases) are as follows (in millions):

	Operating		Finance
	Leases		Leases
Three months ending December 31, 2019	$	76	$	122
2020		289		474
2021		256		456
2022		206		576
2023		174		141
Thereafter		562		18
Total minimum lease payments		1,563		1,787
Less: Interest		312		183
Present value of lease obligations		1,251		1,604
Less: Current portion		223		387
Long-term portion of lease obligations	$	1,028	$	1,217

As previously reported in our Annual Report on Form 10-K for the year ended December 31, 2018 and under legacy lease accounting (ASC 840), future minimum lease payments under non-cancellable leases as of December 31, 2018 are as follows (in millions):

	Operating		Finance
	Leases		Leases
2019	$	276	$	417
2020		257		503
2021		230		506
2022		183		24
2023		158		5
Thereafter		524		6
Total minimum lease payments	$	1,628		1,461
Less: Interest				122
Present value of lease obligations				1,339
Less: Current portion				346
Long-term portion of lease obligations			$	993

Under the new lease standard, we are the lessor of certain vehicle arrangements as described in Note 2, Summary of Significant Accounting Policies. As of September 30, 2019, maturities of our operating lease receivables from customers for each of the next five years and thereafter were as follows (in millions):

Three months ending December 31, 2019	$	155
2020		568
2021		418
2022		251
2023		188
Thereafter		2,458
Total	$	4,038

As previously reported in our Annual Report on Form 10-K for the year ended December 31, 2018 and under legacy lease accounting (ASC 840), future minimum lease payments to be received from customers under non-cancellable leases as of December 31, 2018 are as follows (in millions):

2019	$	502
2020		418
2021		271
2022		187
2023		189
Thereafter		2,469
Total	$	4,036

The above tables do not include vehicle sales to customers or leasing partners with a resale value guarantee as the cash payments were received upfront. For our solar PPA arrangements, customers are charged solely based on actual power produced by the installed solar energy system at a predefined rate per kilowatt-hour of power produced. The future payments from such arrangements are not included in the above table as they are a function of the power generated by the related solar energy systems in the future. Following the adoption of the new lease standard, solar energy system sales and PPAs that commence after January 1, 2019, where we are the lessor and were previously accounted for as leases, will no longer meet the definition of a lease and are therefore not included in the table as of September 30, 2019 (refer to Note 2, Summary of Significant Accounting Policies).