Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2024

Goodwill and Other Intangible Assets [Abstract]

Intangible Assets Subject to Amortization

Acquired intangible assets subject to amortization as of June 30, 2024 and December 31, 2023 were as follows:

			Jun. 30, 2024				Dec. 31, 2023
(in millions of dollars)	Weighted Average Useful Life (Years)		Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Tradenames		34	$	221.3	$	61.6	$	221.5	$	59.1
Technology		13		18.8		14.9		18.8		14.2
Patents and trademarks		19		6.4		6.4		6.4		6.4
Customer relationships		21		78.4		17.3		79.0		15.0
		29	$	324.9	$	100.2	$	325.7	$	94.7