International Paper leases various real estate, including certain operating facilities, warehouses, office space and land. The Company also leases material handling equipment, vehicles, and certain other equipment. The Company's leases have remaining lease terms of one year to 97 years. Leases having an initial term of twelve months or less are not recorded on the balance sheet and the related lease expense is recognized on a straight-line basis over the term of the lease. In addition, the Company has applied the practical expedient to account for the lease and non-lease components as a single lease component for all of the Company's leases.

Right-of-use (ROU) assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Effective January 1, 2019, operating lease ROU assets and liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. The Company's leases may include options to extend or terminate the lease. These options to extend are included in the lease term when it is reasonably certain that we will exercise that option. Some leases have variable payments, however, because they are not based on an index or rate, they are not included in the ROU assets and liabilities. Variable payments for real estate leases primarily relate to common area maintenance, insurance, taxes and utilities. Variable payments for equipment, vehicles, and leases within supply agreements primarily relate to usage, repairs, and maintenance. As the implicit rate is not readily determinable for most of the Company's leases, the Company applies a portfolio approach using an estimated incremental borrowing rate to determine the initial present value of lease payments over the lease terms, which is based on market and company specific information.

Components of Lease Expense



In millions	March 31, 2019
Operating lease costs	$	39
Variable lease costs	22
Short-term lease costs	11
Finance lease cost
Amortization of lease assets	2
Interest on lease liabilities	1
Total lease cost, net	$	75

Supplemental Balance Sheet Information Related to Leases



In millions	Classification	March 31, 2019
Assets
Operating lease assets	Right-of-use assets	$	415
Finance lease assets	Plants, properties and equipment, net (a)	104
Total leased assets		$	519
Liabilities
Current
Operating	Other current liabilities	$	137
Finance	Notes payable and current maturities of long-term debt	9
Noncurrent
Operating	Long-term lease obligations	281
Finance	Long-term debt	90
Total lease liabilities		$	517


(a)	Finance leases are recorded net of accumulated amortization of $33 million.

Lease Term and Discount Rate



In millions	March 31, 2019
Weighted average remaining lease term (years)
Operating leases	10.15 years
Finance leases	11.93 years
Weighted average discount rate
Operating leases	3.28	%
Finance leases	4.55	%

Supplemental Cash Flow Information Related to Leases



In millions	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows related to operating leases	$	(35	)
Financing cash flows related to finance leases	(2		)

Maturity of Lease Liabilities



	March 31, 2019
In millions	Operating Leases		Financing Leases		Total
2019 (remainder of year)	$	111	$	11	$	122
2020	117		14		131
2021	78		12		90
2022	47		11		58
2023	26		11		37
Thereafter	100		76		176
Total lease payments	479		135		614
Less: Interest (a)	61		36		97
Present value of lease liabilities	$	418	$	99	$	517


(a)	Calculated using the interest rate for each lease.

At December 31, 2018, total future minimum commitments under existing non-cancelable operating leases were as follows:



In millions	2019		2020		2021		2022		2023		Thereafter
Lease obligations	$	160	$	125	$	77	$	49	$	28	$	118