Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Intangible Assets

The following table sets forth net intangible assets, other than goodwill, at December 31:

	2017							2016
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in millions)
Amortized intangible assets
Capitalized software	$	1,572	$	(888	)	$	684	$	1,210	$	(768	)	$	442
Trademarks and tradenames	30		(29		)	1		26		(22		)	4
Customer relationships	473		(214		)	259		283		(162		)	121
Other	27		(26		)	1		23		(22		)	1
Total	2,102		(1,157		)	945		1,542		(974		)	568
Unamortized intangible assets
Customer relationships	175		—			175		154		—			154
Total	$	2,277	$	(1,157	)	$	1,120	$	1,696	$	(974	)	$	722

Schedule of Estimated Future Amortization Expense

The following table sets forth the estimated future amortization expense on amortizable intangible assets on the consolidated balance sheet at December 31, 2017 for the years ending December 31:

	(in millions)
2018	$	257
2019	214
2020	147
2021	82
2022 and thereafter	245
	$	945