Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Summary of Inventory

Inventories consisted of the following:

	December 31,
(Millions of dollars)	2019			2018
Finished products - FIFO basis	$	259.2		$	219.4
Less LIFO reserve - finished products	(160.8		)	(115.5		)
Finished products - LIFO basis	98.4			103.9
Store merchandise for resale	123.0			107.2
Materials and supplies	6.2			10.4
Total inventories	$	227.6		$	221.5