Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill are as follows:

($ in millions)
Balance, January 1, 2019	$	1,139.5
Foreign currency translation and other	18.3
Balance, December 31, 2019	1,157.8
Impairment charge	(85.3)
Foreign currency translation and other	19.6
Balance, December 31, 2020	$	1,092.1

Schedule of Finite-Lived Intangible Assets

The following summarizes the gross carrying value and accumulated amortization for each major category of intangible asset as of December 31:

		2020						2019
($ in millions)	Weighted Average Amortization Period	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Finite-lived intangibles:
Patents and technology	6 years	$	75.1	$	(50.9)	$	24.2	$	70.2	$	(44.5)	$	25.7
Customer relationships and other intangibles	7 years	277.3		(152.5)		124.8		268.0		(125.3)		142.7
Total finite-lived intangibles		352.4		(203.4)		149.0		338.2		(169.8)		168.4
Indefinite-lived intangibles:
Trademarks and trade names		101.5		—		101.5		105.9		—		105.9
Total intangibles		$	453.9	$	(203.4)	$	250.5	$	444.1	$	(169.8)	$	274.3

Schedule of Indefinite-Lived Intangible Assets

The following summarizes the gross carrying value and accumulated amortization for each major category of intangible asset as of December 31:

		2020						2019
($ in millions)	Weighted Average Amortization Period	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Finite-lived intangibles:
Patents and technology	6 years	$	75.1	$	(50.9)	$	24.2	$	70.2	$	(44.5)	$	25.7
Customer relationships and other intangibles	7 years	277.3		(152.5)		124.8		268.0		(125.3)		142.7
Total finite-lived intangibles		352.4		(203.4)		149.0		338.2		(169.8)		168.4
Indefinite-lived intangibles:
Trademarks and trade names		101.5		—		101.5		105.9		—		105.9
Total intangibles		$	453.9	$	(203.4)	$	250.5	$	444.1	$	(169.8)	$	274.3

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Based on the intangible assets recorded as of December 31, 2020, amortization expense is estimated to be as follows for the next five years and thereafter:

($ in millions)
2021	$	29.3
2022	24.9
2023	23.7
2024	22.6
2025	18.8
2026 and thereafter	29.7
Total	$	149.0