Goodwill and intangible assets (Tables)

9 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table sets forth goodwill by segment as of October 1, 2019 and June 30, 2020:

	Americas		International		Total
Balance at October 1, 2019	$	861.6	$	143.2	$	1,004.8
Battery Acquisition	0.7		0.2		0.9
Auto Care Acquisition	3.8		0.1		3.9
Cumulative translation adjustment	(0.3)		(0.6)		(0.9)
Balance at June 30, 2020	$	865.8	$	142.9	$	1,008.7

Schedule of Finite-Lived Intangible Assets

Total intangible assets at June 30, 2020 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks and trade names	$	59.7	$	(12.9)	$	46.8
Customer relationships	394.2		(54.2)		340.0
Patents	34.5		(10.2)		24.3
Proprietary technology	172.5		(32.1)		140.4
Proprietary formulas	2.4		(0.4)		2.0
Non-compete	0.5		(0.4)		0.1
Vendor relationships	5.7		(0.8)		4.9
Total Amortizable intangible assets	669.5		(111.0)		558.5
Trademarks and trade names - indefinite lived	1,364.9		—		1,364.9
Total Other intangible assets, net	$	2,034.4	$	(111.0)	$	1,923.4

Total intangible assets at September 30, 2019 were as follows:

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks and trade names	$	59.7	$	(9.9)	$	49.8
Customer relationships	394.2		(34.3)		359.9
Patents	34.5		(8.2)		26.3
Proprietary technology	172.5		(15.7)		156.8
Proprietary formulas	2.4		(0.3)		2.1
Non-compete	0.5		(0.3)		0.2
Total Amortizable intangible assets	663.8		(68.7)		595.1
Trademarks and trade names - indefinite lived	1,363.8		—		1,363.8
Total Other intangible assets, net	$	2,027.6	$	(68.7)	$	1,958.9