Leases (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Balances of Right of Use Assets and Liabilities of Finance Leases and Operating Leases

The balances of right-of-use assets and liabilities of finance leases and operating leases, and their locations on our Consolidated Balance Sheets are as follows:

		Year Ended December 31,
	Balance Sheet Location	2021		2020
Right-of-use assets
Operating leases, gross	Other long-term assets	$	50.8	$	52.7
Finance leases, gross	Property, plant and equipment		55.6		51.8

Lease liabilities
Current:
Operating leases	Accrued liabilities	$	11.7	$	12.0
Finance leases	Current debt obligations		12.8		12.1
Non-current:
Operating leases	Other long-term liabilities	$	34.5	$	46.2
Finance leases	Long-term debt		13.7		18.7

Summary of Components of Lease Expense

Operating lease costs and short-term lease costs are included in Operating expenses or General and administrative expense in our Consolidated Statements of Operations, depending on the nature of the leases. Finance lease costs are included in Depreciation and amortization expense and Interest income (expense) in our Consolidated Statements of Operations. The components of lease expense were as follows:

	Year Ended December 31,
	2021		2020		2019
Lease cost
Operating lease cost	$	12.2	$	11.6	$	9.9
Short-term lease cost		20.4		20.7		30.0
Variable lease cost		5.7		5.5		6.7
Finance lease cost
Amortization of right-of-use assets		13.3		13.6		13.1
Interest expense		1.1		1.4		1.6
Total lease cost	$	52.7	$	52.8	$	61.3

Summary of Other Supplemental Information Related to Leases

Other supplemental information related to our leases are as follows:

	Year Ended December 31,
	2021		2020		2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases	$	14.1	$	12.3	$	8.7
Operating cash flows for finance leases		1.0		1.4		1.6
Financing cash flows for finance leases		12.5		12.4		11.5

Summary of Maturities of Lease Liabilities Under Non-cancellable Leases

The following table presents the maturities of our lease liabilities under non-cancellable leases as of December 31, 2021:

	Operating Leases			Finance Leases

2022	$	13.3		$	13.1
2023		11.5			8.0
2024		7.1			3.5
2025		4.2			2.2
2026		3.9			1.1
Thereafter		11.6			—
Total undiscounted cash flows		51.6			27.9
Less imputed interest		(5.4	)		(1.4	)
Total lease liabilities	$	46.2		$	26.5