Leases

12 Months Ended

Dec. 31, 2019

We enter into lease arrangements primarily for real estate, project equipment, transportation and information technology assets in the normal course of our business operations. Real estate leases accounted for approximately 85% of our lease obligations at December 31, 2019. An arrangement is determined to be a lease at inception if it conveys the right to control the use of identified property and equipment for a period of time in exchange for consideration. We have elected not to recognize an ROU asset and lease liability for leases with an initial term of 12 months or less. Many of our equipment leases, primarily associated with the performance of projects for U.S. government customers, include one or more renewal option periods, with renewal terms that can extend the lease term in one year increments. The exercise of these lease renewal options is at our sole discretion and is generally dependent on the period of project performance, or extension thereof, determined by our customers. When it is reasonably certain that we will exercise the option, we include the impact of the option in the lease term for purpose of determining total future lease payments. As most of our lease agreements do not explicitly state the discount rate implicit in the lease, we use our incremental borrowing rate on the commencement date to calculate the present value of future lease payments.

Certain leases include payments that are based solely on an index or rate. These variable lease payments are included in the calculation of the ROU asset and lease liability. Other variable lease payments, such as usage-based amounts, are excluded from the ROU asset and lease liability, and are expensed as incurred. In addition to the present value of the future lease payments, the calculation of the ROU asset also includes any deferred rent, lease pre-payments and initial direct costs of obtaining the lease, such as commissions.

In addition to the base rent, real estate leases typically contain provisions for common-area maintenance and other similar services, which are considered non-lease components for accounting purposes. We exclude these non-lease components in calculating the ROU asset and lease liability for real estate leases and expense them as incurred. For all other types of leases, non-lease components are included in calculating our ROU assets and lease liabilities.

The components of lease costs for the year ended December 31, 2019 were as follows:



	December 31,
Dollars in millions	2019
Operating lease cost	$	54
Short-term lease cost	121
Total lease cost	$	175

Operating lease cost for the year ended ended December 31, 2019 includes operating lease ROU asset amortization of $38 million and other noncash operating lease costs of $16 million related to the accretion of operating lease liabilities and straight-line lease accounting.

Total rent expense on our operating leases under the previous lease standard were $144 million and $139 million for the years ended December 31, 2018 and 2017, respectively.

Total short-term lease commitments as of December 31, 2019 was approximately $77 million. Additional information related to leases was as follows:



	December 31,
Dollars in millions	2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	56
Right-of-use assets obtained in exchange for new operating lease liabilities	$	20
Weighted-average remaining lease term-operating (in years)	8.0
Weighted-average discount rate-operating leases	7.6		%

The following is a maturity analysis of the future undiscounted cash flows associated with our operating lease liabilities as of December 31, 2019:



	Year
Dollars in millions	2020		2021		2022		2023		2024		Thereafter		Total
Future payments - operating leases	$	54	$	44	$	37	$	33	$	25	$	119	$	312



Dollars in millions	Operating Leases
Total future payments	$	312
Less imputed interest	(81		)
Present value of future lease payments	$	231
Less current portion of lease obligations	(39		)
Noncurrent portion of lease obligations	$	192

As of December 31, 2018, future total rent payments on noncancellable operating leases under the previous lease standard were $367 million in the aggregate, which consisted of the following: $76 million in 2019; $48 million in 2020; $39 million in 2021; $32 million in 2022; $29 million in 2023; and $143 million thereafter.