XML 35 R21.htm IDEA: XBRL DOCUMENT v3.24.0.1
Goodwill and Other Intangible Assets (Notes)
 12 Months Ended
Dec. 31, 2023
Goodwill and intangible assets [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Other Intangible Assets
Goodwill
Goodwill is the excess purchase price remaining from an acquisition after an allocation of purchase price has been made to identifiable assets acquired and liabilities assumed based on estimated fair values. The Company transitioned to the new segment reporting structure effective January 1, 2022 which resulted in certain changes to our operating segments and reporting units. Additionally, the Company transferred certain agencies between operating segments as of January 1, 2023 which resulted in certain changes to our reporting units and reportable segments. We have allocated goodwill to our reporting units using a relative fair value approach. In addition, we completed an assessment of any potential goodwill impairment for all reporting units immediately prior and subsequent to the reallocations and determined that no impairment existed.
The changes in the carrying value of goodwill for our reportable segments, MD&E, IA&C and SC&E, for the years ended December 31, 2023 and 2022 are listed below.
 IAN DXTRAMD&EIA&CSC&E
Total 1
Balance as of December 31, 2021$4,231.6 $677.1 $— $— $— $4,908.7 
Goodwill Reallocation(4,231.6)(677.1)2,293.0 1,920.2 695.5 — 
Balance as of January 1, 2022$— $— $2,293.0 $1,920.2 $695.5 $4,908.7 
Acquisitions/(Dispositions) and Deconsolidations— — 209.5 (6.5)— 203.0 
Foreign currency and other— — (14.9)(35.1)(11.1)(61.1)
Balance as of December 31, 2022$— $— $2,487.6 $1,878.6 $684.4 $5,050.6 
Goodwill Reallocation— — 180.6 (180.6)— — 
Balance as of January 1, 2023$— $— $2,668.2 $1,698.0 $684.4 $5,050.6 
Acquisitions/(Dispositions)— — 2.2 10.7 (9.8)3.1 
Foreign currency and other— — 7.1 14.5 5.6 27.2 
Balance as of December 31, 2023$— $— $2,677.5 $1,723.2 $680.2 $5,080.9 
1For all periods presented, no goodwill impairment charge has been recorded.
See Note 1 for information regarding our annual impairment testing methodology.
Other Intangible Assets
Other intangible assets primarily consist of customer lists and know-how and technology, which have definite lives and are subject to amortization on a straight-line basis with estimated useful lives generally between 7 and 15 years, as well as trade names which have both indefinite and definite lives which are subject to amortization on a straight-line basis with estimated useful lives of 15 years. Amortization expense for other intangible assets for the years ended December 31, 2023, 2022 and 2021 was $84.0, $84.7 and $86.2, respectively. There were no material impairment charges on other intangibles for the years ended December 31, 2023, 2022 and 2021. During 2023 and 2022, we recorded approximately $8.5 and $62.0, respectively, of other intangible assets related to our acquisitions.
The following table provides a summary of other intangible assets, which are included in our Consolidated Balance Sheets.
 December 31,
 20232022
Gross AmountAccumulated
Amortization		Net AmountGross AmountAccumulated
Amortization		Net Amount
Customer lists$882.1 $(431.6)$450.5 $873.1 $(378.4)$494.7 
Know-how and technology239.5 (138.9)100.6 239.2 (111.1)128.1 
Trade names227.3 (45.7)181.6 231.8 (47.4)184.4 
Other16.2 (5.3)10.9 16.2 (5.3)10.9 
Total 1
$1,365.1 $(621.5)$743.6 $1,360.3 $(542.2)$818.1 
1Total gross amount includes indefinite-lived intangible assets not subject to amortization of $165.7 and $165.4 in the years ended December 31, 2023 and 2022, respectively, which primarily consist of trade names.

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2023 is listed below.
20242025202620272028
Estimated amortization expense$83.1 $80.4 $78.4 $65.1 $49.8