Intangible Assets and Goodwill (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

Intangible assets, net of accumulated amortization, impairment charges and adjustments are summarized as follows:

		As of September 30, 2021						As of December 31, 2020
(In millions)	Estimated Life	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Completed technology	4-28 years	$	7,411.2	$	(5,320.4)	$	2,090.8	$	7,394.3	$	(5,136.5)	$	2,257.8
In-process research and development	Indefinite until commercialization	132.0		—		132.0		762.5		—		762.5
Trademarks and trade names	Indefinite	64.0		—		64.0		64.0		—		64.0
Total intangible assets		$	7,607.2	$	(5,320.4)	$	2,286.8	$	8,220.8	$	(5,136.5)	$	3,084.3

Estimated future amortization for acquired intangible assets

The estimated future amortization of finite-lived intangible assets for the next five years is expected to be as follows:

(In millions)	As of September 30, 2021
2021 (remaining three months)	$	70.0
2022	255.0
2023	210.0
2024	195.0
2025	195.0
2026	180.0

Summary of roll forward of the changes in goodwill

The following table provides a roll forward of the changes in our goodwill balance:

(In millions)	As of September 30, 2021
Goodwill, December 31, 2020	$	5,762.1
Other	(1.6)
Goodwill, September 30, 2021	$	5,760.5