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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amounts of Goodwill by Segment
The changes in the carrying amounts of goodwill by segment were as follows:
EIGEMGTotal
(In millions)
Balance at December 31, 2018$2,452.0 $1,160.0 $3,612.0 
Goodwill acquired398.9 42.3 441.2 
Purchase price allocation adjustments and other35.5 (50.0)(14.5)
Foreign currency translation adjustments5.8 3.0 8.8 
Balance at December 31, 20192,892.2 1,155.3 4,047.5 
Goodwill acquired57.3 — 57.3 
Purchase price allocation adjustments and other74.6 — 74.6 
Foreign currency translation adjustments26.2 19.3 45.5 
Balance at December 31, 2020$3,050.3 $1,174.6 $4,224.9 
Other Intangible Assets
Other intangible assets were as follows at December 31:
20202019
(In thousands)
Definite-lived intangible assets (subject to amortization):
Patents$49,396 $47,872 
Purchased technology487,517 517,464 
Customer lists2,326,934 2,282,184 
2,863,847 2,847,520 
Accumulated amortization:
Patents(37,858)(36,697)
Purchased technology(209,308)(164,231)
Customer lists(745,945)(625,591)
(993,111)(826,519)
Net intangible assets subject to amortization1,870,736 2,021,001 
Indefinite-lived intangible assets (not subject to amortization):
Trademarks and trade names752,983 741,871 
$2,623,719 $2,762,872