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Goodwill and Acquired Client Relationships (Tables)
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in Goodwill
The following tables present the changes in the Company’s consolidated Affiliates’ Goodwill and components of Acquired client relationships (net):
Goodwill
20212022
Balance, beginning of period$2,661.4 $2,689.2 
New investments30.5 — 
Foreign currency translation(1.1)(40.5)
Other(1.6)— 
Balance, end of period$2,689.2 $2,648.7 
Schedule of Changes in the Components of Acquired Client Relationships
 Acquired Client Relationships (Net)
 Definite-livedIndefinite-livedTotal
 Gross Book
Value		Accumulated
Amortization		Net Book
Value		Net Book
Value		Net Book
Value
Balance, as of December 31, 2020$1,166.6 $(1,026.8)$139.8 $909.0 $1,048.8 
New investments232.0 — 232.0 725.0 957.0 
Intangible amortization and impairments— (35.7)(35.7)— (35.7)
Foreign currency translation0.6 (0.6)— (3.7)(3.7)
Transfers(1)
(35.0)35.0 — — — 
Balance, as of December 31, 2021$1,364.2 $(1,028.1)$336.1 $1,630.3 $1,966.4 
Intangible amortization and impairments— (49.1)(49.1)(2.5)(51.6)
Foreign currency translation(9.1)7.5 (1.6)(37.2)(38.8)
Balance, as of December 31, 2022$1,355.1 $(1,069.7)$285.4 $1,590.6 $1,876.0 
__________________________
(1)Transfers include acquired client relationships at Affiliates that were deconsolidated during the period.