Goodwill and Intangible Assets

3 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Note 7 — Goodwill and Intangible Assets

Goodwill and intangible assets comprise the following: 

	December 31, 2019			September 30, 2019			December 31, 2018
Goodwill	$	3,482.9		$	3,456.4		$	3,154.8
Intangible assets:
Customer relationships	$	1,054.9		$	1,038.4		$	795.4
Trademarks and tradenames	16.4			16.2			7.9
Noncompete agreements and other	54.8			46.4			57.6
Accumulated amortization	(473.5		)	(441.8		)	(405.4		)
Intangible assets, net (definite-lived)	652.6			659.2			455.5
Trademarks and tradenames (indefinite-lived)	50.8			49.4			49.7
Total intangible assets, net	$	703.4		$	708.6		$	505.2

The change in goodwill since September 30, 2019 is primarily due to the effects of foreign currency translation. Amortization expense of intangible assets was $16.8 and $14.6 for the three months ended December 31, 2019 and 2018, respectively. Amortization expense included in “Cost of sales” on the Condensed Consolidated Statements of Income was not material. The estimated aggregate amortization expense of intangible assets for the remainder of Fiscal 2020 and for the next four fiscal years is as follows: remainder of Fiscal 2020 — $48.7; Fiscal 2021 — $61.8; Fiscal 2022 — $58.8; Fiscal 2023 — $57.3; Fiscal 2024 — $56.1.