Goodwill and Other Intangibles (Tables)

3 Months Ended

Mar. 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:

March 31,
(In millions)	2017		2016
Balance as of January 1, as reported	$	8,369	$	7,889
Goodwill acquired	363		61
Other adjustments(a)	37		—
Balance at March 31,	$	8,769	$	7,950

^(a)  The increase in 2017 primarily reflects the impact of foreign exchange.

Amortized Intangible Assets

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

	March 31, 2017						December 31, 2016
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	1,591	$	422	$	1,169	$	1,390	$	392	$	998
Other (a)	205		83		122		204		76		128
Amortized intangibles	$	1,796	$	505	$	1,291	$	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 March 31, 2017)	$	126
2018	161
2019	153
2020	135
2021	129
Subsequent years	587
	$	1,291