Goodwill and Other Intangibles (Tables)

6 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill are as follows:

June 30,
(In millions)	2017		2016
Balance as of January 1, as reported	$	8,369	$	7,889
Goodwill acquired	370		62
Other adjustments(a)	82		(6		)
Balance at June 30,	$	8,821	$	7,945

Amortized Intangible Assets

The gross cost and accumulated amortization at June 30, 2017 and December 31, 2016 are as follows:

	June 30, 2017						December 31, 2016
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	1,581	$	453	$	1,128	$	1,390	$	392	$	998
Other (a)	198		93		105		204		76		128
Amortized intangibles	$	1,779	$	546	$	1,233	$	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)	Estimated Expense
2017 (excludes amortization through June 30, 2017)	$	85
2018	158
2019	149
2020	127
2021	118
Subsequent years	596
	$	1,233