Intangible Assets and Goodwill (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill

The following table summarizes the carrying amount of our intangible assets and goodwill, net of accumulated amortization and impairment charges: 

		June 30, 2020							December 31, 2019
	Estimated Life (years)	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization		Net
Licensing rights	3-8	$	57.0	$	(36.5)		$	20.5	$	57.0	$	(34.7)	$	22.3
Patents	7	10.5		(10.5)			—		10.5		(10.5)		—
Purchased technology	6-16	4,710.5		(3,578.4)		(a)	1,132.1		4,710.5		(1,388.7)		3,321.8
Other intangibles	5	0.4		(0.3)			0.1		0.4		(0.2)		0.2
Acquired IPR&D	Indefinite	907.0		—			907.0		—		—		—
Total		$	5,685.4	$	(3,625.7)		$	2,059.7	$	4,778.4	$	(1,434.1)	$	3,344.3
Goodwill	Indefinite	$	5,078.1	$	(2.9)		$	5,075.2	$	5,040.3	$	(2.9)	$	5,037.4
(a) Includes an impairment charge of $2,042.3 recognized during the second quarter 2020 related to the KANUMA intangible asset

Summary of Changes in Goodwill

The following summarizes the changes in the carrying amount of goodwill:

	June 30, 2020
Balance at December 31, 2019	$	5,037.4
Goodwill resulting from the acquisition of Achillion	37.8
Balance at June 30, 2020	$	5,075.2