Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Operating Lease Liabilities

Operating lease liabilities are included in the Consolidated Balance Sheets as follows (in millions):

	December 31,
	2021		2020
Operating lease liabilities:
Trade accounts payable and other accrued liabilities	$	10.7	$	13.5
Other non-current liabilities		26.4		29.7
Total operating lease liabilities	$	37.1	$	43.2

Maturity of Operating Lease Liabilities

As of December 31, 2021, maturities of operating lease liabilities were as follows (in millions):

2022	$	10.9
2023		9.1
2024		8.1
2025		3.3
2026		2.8
Thereafter		4.7
Total		38.9
Less: imputed interest		(1.8)
Total	$	37.1

Supplemental Information

Supplemental information related to operating leases is as follows (in millions, except lease term and discount rate):

	Year ended December 31,
	2021		2020
Operating lease cost (1)	$	18.5	$	18.1
Operating cash outflows related to lease liabilities		13.7		12.4
Non-cash additions for right-of-use assets, net of modifications		6.4		21.5

	December 31,
	2021		2020
Weighted average remaining lease term (in years)	4.7		5.3
Weighted average discount rate	2.25	%	3.30	%

(1) Operating lease cost includes right-of-use asset amortization as well as short-term and variable lease costs. Accelerated right-of-use asset amortization included in operating lease cost was $4.0 million and $2.8 million for the years ended December 31, 2021 and 2020, respectively.