Other Assets (Tables)

12 Months Ended

Dec. 31, 2016

The following is a summary of Other assets as of December 31:

(Millions)	2016		2015
Goodwill	$	2,927	$	2,749
Deferred tax assets, net^(a)		2,336		2,231
Prepaid expenses		696		851
Other intangible assets, at amortized cost		868		796
Tax Credit investments		824		638
Restricted cash^(b)		286		477
Derivative assets^(a)		555		282
Other		2,069		2,045
Total	$	10,561	$	10,069

Refer to Notes 14 and 21 for a discussion of derivative assets and deferred tax assets, net, respectively, as of December 31, 2016 and 2015. For 2016 and 2015, $81 million and $80 million, respectively, of foreign deferred tax liabilities is reflected in Other liabilities. Derivative assets reflect the impact of master netting agreements.
Includes restricted cash available to settle obligations related to certain Card Member credit balances and customer deposits, as well as coupon and maturity obligations of consolidated VIEs.

Changes in carrying amount of goodwill

The changes in the carrying amount of goodwill reported in the Company’s reportable operating segments and Corporate & Other were as follows:

(Millions)	USCS		ICNS		GCS		GMS		Corporate & Other		Total
Balance as of January 1, 2015	$	122	$	673	$	1,715	$	291	$	223	$	3,024
Acquisitions		―		―		―		―		―		―
Dispositions		―		―		―		―		―		―
Other, including impairment and foreign currency translation^(a)		―		(53)		―		―		(222)		(275)
Balance as of December 31, 2015	$	122	$	620	$	1,715	$	291	$	1	$	2,749
Acquisitions		―		―		―		201		―		201
Dispositions		―		―		―		―		―		―
Other, including foreign currency translation^(a)		―		(16)		(3)		(3)		(1)		(23)
Balance as of December 31, 2016	$	122	$	604	$	1,712	$	489	$	―	$	2,927

Includes $1 million and $219 million in impairment charges within Corporate & Other as of December 31, 2016 and 2015, respectively. Refer to Note 2 for additional information.

Components of other intangible assets

The components of other intangible assets were as follows:

		2016						2015
(Millions)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	$	1,625	$	(895)	$	730	$	1,506	$	(836)	$	670
Other		260		(122)		138		231		(105)		126
Total	$	1,885	$	(1,017)	$	868	$	1,737	$	(941)	$	796

Estimated amortization expense for other intangible assets

Estimated amortization expense for other intangible assets over the next five years is as follows:

(Millions)			2017			2018			2019			2020			2021
Estimated amortization expense		$	189		$	175		$	146		$	121		$	93