Intangible Assets and Goodwill (Tables)

9 Months Ended

Sep. 30, 2020

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, 2020						As of December 31, 2019
(In millions)	Estimated Life	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Completed technology	4-28 years	$	7,394.3	$	(5,077.7)	$	2,316.6	$	7,379.3	$	(4,881.4)	$	2,497.9
In-process research and development	Indefinite until commercialization	943.0		—		943.0		965.5		—		965.5
Trademarks and trade names	Indefinite	64.0		—		64.0		64.0		—		64.0
Total intangible assets		$	8,401.3	$	(5,077.7)	$	3,323.6	$	8,408.8	$	(4,881.4)	$	3,527.4

Estimated future amortization for acquired intangible assets

he 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, 2020
2020 (remaining three months)	$	60.0
2021	205.0
2022	215.0
2023	215.0
2024	225.0
2025	220.0

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, 2020
Goodwill, December 31, 2019	$	5,757.8
Other	(2.1)
Goodwill, September 30, 2020	$	5,755.7