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Goodwill and Other Intangibles
9 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangibles
Goodwill and Other Intangibles
The carrying amounts of goodwill and other intangibles assets, reflecting the effect of foreign exchange rates on non-U.S.-dollar-denominated balances, by reporting segment at September 30, 2017, and December 31, 2016, were as follows:
Table 49: Goodwill by Reporting Segment
(In Millions)
September 30,
2017
 
December 31,
2016
Corporate & Institutional Services
$
455.3

 
$
448.4

Wealth Management
71.2

 
71.0

Total Goodwill
$
526.5

 
$
519.4


The gross carrying amount and accumulated amortization of other intangible assets subject to amortization as of September 30, 2017 and December 31, 2016, were as follows:
Table 50: Other Intangible Assets
(In Millions)
September 30,
2017
 
December 31,
2016
Gross Carrying Amount
$
94.5

 
$
89.0

Less: Accumulated Amortization
56.6

 
47.2

Net Book Value
$
37.9

 
$
41.8


Other intangible assets consist primarily of the value of acquired client relationships and are included within other assets in the consolidated balance sheets. Amortization expense related to other intangible assets totaled $2.3 million and $7.0 million for the three and nine months ended September 30, 2017, respectively, and $2.0 million and $6.3 million for the three and nine months ended September 30, 2016, respectively. Amortization for the remainder of 2017 and for the years 2018, 2019, 2020, and 2021 is estimated to be $2.3 million, $8.7 million, $8.5 million, $8.5 million and $6.0 million, respectively.