Leases

12 Months Ended

Dec. 31, 2019

The following table provides details of our operating lease expense:



	Year ended December 31,
	2019		2018 (a)		2017 (a)
	in millions

Operating lease expense:
Operating lease cost	$	45.7	$	48.2	$	49.1
Short-term lease cost	10.4		—		—
Total operating lease expense	$	56.1	$	48.2	$	49.1


(a)	Amounts reflect operating lease expense recorded under ASC 840, Leases, prior to adoption of ASU 2016-02 on January 1, 2019. Accordingly, amounts are not comparable.

The following table provides certain other details of our operating leases at December 31, 2019:



For the year ended December 31, 2019 (in millions):
Operating cash flows from operating leases	$	46.2
Right-of-use assets obtained in exchange for new operating lease liabilities (a)	$	48.0

As of December 31, 2019 (in millions):
Operating lease right-of-use assets	$	150.9
Operating lease liabilities:
Current	$	31.5
Noncurrent	119.2
Total operating lease liabilities	$	150.7

Weighted-average remaining lease term	6.4 years

Weighted-average discount rate	6.6		%


(a)	Represents non-cash transactions associated with operating leases entered into during the year ended December 31, 2019.

Maturities of Operating Leases

Maturities of our operating lease liabilities on an undiscounted basis as of December 31, 2019 are presented below along with the current and noncurrent operating lease liabilities on a discounted basis. Such amounts represent U.S. dollar equivalents (in millions) based on December 31, 2019 exchange rates.



Years ending December 31:
2020	$	40.2
2021	33.3
2022	27.8
2023	22.0
2024	18.5
Thereafter	45.5
Total operating lease liabilities on an undiscounted basis	187.3
Amount representing interest	(36.6		)
Present value of operating lease liabilities	$	150.7

Current portion	$	31.5

Noncurrent portion	$	119.2