Goodwill And Identifiable Intangibles (Tables)

9 Months Ended

Sep. 30, 2020

Finite-Lived Intangible Assets [Line Items]

Changes in Net Carrying Amount of Goodwill by Segment

Changes in the net carrying amount of goodwill by segment were as follows:


(in millions)	ACCO Brands North America		ACCO Brands EMEA		ACCO Brands International		Total

Balance at December 31, 2019	$	375.6	$	165.7	$	177.3	$	718.6
Acquisitions	—		—		3.9		3.9
Foreign currency translation	—		5.2		(4.3)		0.9
Balance at September 30, 2020	$	375.6	$	170.9	$	176.9	$	723.4

Gross Carrying Value and Accumulated Amortization by Class of Identifiable Intangible Assets

The gross carrying value and accumulated amortization by class of identifiable intangible assets as of September 30, 2020 and December 31, 2019, was as follows:


	September 30, 2020							December 31, 2019
(in millions)	Gross Carrying Amounts		Accumulated Amortization			Net Book Value		Gross Carrying Amounts		Accumulated Amortization			Net Book Value
Indefinite-lived intangible assets:
Trade names	$	458.5	$	(44.5)	(1)	$	414.0	$	467.3	$	(44.5)	(1)	$	422.8
Amortizable intangible assets:
Trade names	315.2		(93.3)			221.9		316.7		(83.7)			233.0
Customer and contractual relationships	245.2		(158.3)			86.9		241.0		(142.3)			98.7
Patents	5.8		(1.8)			4.0		5.5		(1.4)			4.1
Subtotal	566.2		(253.4)			312.8		563.2		(227.4)			335.8
Total identifiable intangibles	$	1,024.7	$	(297.9)		$	726.8	$	1,030.5	$	(271.9)		$	758.6

(1)Accumulated amortization prior to the adoption of authoritative guidance on goodwill and other intangible assets, at which time further amortization ceased.

Estimated Amortization Expense for Future Periods

Estimated amortization expense for amortizable intangible assets as of September 30, 2020, for the current year and the next five years is as follows:


(in millions)	2020		2021		2022		2023		2024		2025
Estimated amortization expense(2)	$	32.0	$	28.4	$	24.9	$	22.6	$	21.0	$	19.4

(2) Actual amounts of amortization expense may differ from estimated amounts due to changes in foreign currency exchange rates, additional intangible asset acquisitions, impairment of intangible assets, accelerated amortization of intangible assets and other events.