Property, Plant and Equipment

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment, at cost, consist of the following (in millions):

	December 31,
	2023		2022
Land	$	61.8	$	60.0
Building and building improvements	129.1		110.4
Refinery machinery and equipment	2,260.1		2,095.4
Pipelines and terminals	1,224.8		1,103.9
Retail store equipment and site improvements	96.5		77.8
Refinery turnaround costs	538.8		485.3
Other equipment	187.8		169.4
Construction in progress	191.8		246.8
	$	4,690.7	$	4,349.0
Less: accumulated depreciation	(1,845.5)		(1,572.6)
	$	2,845.2	$	2,776.4

Depreciation of property, plant and equipment assets was $326.6 million, $272.0 million and $257.2 million during the years ended December 31, 2023, 2022 and 2021, respectively, and is included in depreciation and amortization on the accompanying consolidated statements of income.