LEASES

We lease facilities and equipment primarily related to administrative, research and development, and sales and marketing activities under various non-cancelable operating leases in the United States and international markets. We determine if an arrangement contains a lease at inception. Right-of-use assets and lease liabilities are recognized at the commencement date based on the present value of the lease payments over the lease term, which is the non-cancelable period stated in the contract adjusted for any options to extend or terminate when it is reasonably certain that we will exercise that option. Some of our leases include options to extend the terms for up to 15 years and some include options to terminate the lease within one year after the lease commencement date. Right-of-use assets include any prepaid lease payments, and exclude lease incentives and initial direct costs incurred.

As of March 31, 2019, we do not have material finance leases. As most of our operating leases do not provide an implicit interest rate, we use a portfolio approach to determine a collateralized incremental borrowing rate based on the information available at the commencement date to determine the lease liability. Operating lease expense is recognized on a straight-line basis over the lease term. Operating lease expense was $36 million for the three months ended March 31, 2019.

The following table summarizes balance sheet and other information related to our operating leases as of March 31, 2019 (in millions, except weighted average data):



	Classification	Amount
Right-of-use assets, net	Other long-term assets	$	455
Lease liabilities - current	Other accrued liabilities	$	75
Lease liabilities - noncurrent	Other long-term obligations	$	429
Weighted average remaining lease term		9.5 years
Weighted average discount rate		3.61		%

The following table summarizes other supplemental information related to our operating leases (in millions):



	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities	$	18
Right-of-use assets obtained in exchange for lease liabilities	$	30

The following table summarizes a maturity analysis of our operating lease liabilities showing the aggregate lease payments as of March 31, 2019 (in millions):



Fiscal Year	Amount
2019 (remaining nine months)	$	69
2020	84
2021	72
2022	65
2023	57
Thereafter	257
Total undiscounted lease payments	604
Less: imputed interest	(100		)
Total discounted lease payments	$	504

The following table summarizes the aggregate undiscounted non-cancelable future minimum lease payments for operating leases under the prior leases standard as of December 31, 2018 (in millions):



Fiscal Year	Amount
2019	$	89
2020	78
2021	66
2022	60
2023	52
Thereafter	229
Total minimum lease payments	$	574