Goodwill And Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill are as follows:

(In millions of dollars)	2017		2016
Balance as of January 1, as reported	$	8,369	$	7,889
Goodwill acquired	551		556
Other adjustments(a)	169		(76		)
Balance at December 31,	$	9,089	$	8,369

(a) Primarily due to the impact of foreign exchange in both years.

Schedule of Finite-Lived Intangible Assets

The gross cost and accumulated amortization at December 31, 2017 and 2016 are as follows:

(In millions of dollars)	2017						2016
	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client relationships	$	1,672	$	518	$	1,154	$	1,390	$	392	$	998
Other (a)	234		114		120		204		76		128
Amortized intangibles	$	1,906	$	632	$	1,274	$	1,594	$	468	$	1,126

(a) Primarily non-compete agreements, trade names and developed technology

Estimated Future Aggregate Amortization Expense

The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions of dollars)
2018	$	180
2019	170
2020	149
2021	139
2022	125
Subsequent years	511
	$	1,274