Revenue from Contracts with Customers Accounted for in Accordance with ASC 606 (Tables)

6 Months Ended

Jun. 30, 2019

Revenue From Contract With Customer [Abstract]

Summary of Disaggregation of Revenue from Contracts Accounted Under ASC 606 with Customers

The following tables illustrate the disaggregation of revenue from contracts accounted for under ASC 606 with customers according to service type and client type by reportable operating segment.

Revenue by Service Type

	Three Months Ended June 30,
	2019						2018
(Dollars in millions)	Federal Education Loans		Business Processing		Total Revenue		Federal Education Loans		Business Processing		Total Revenue
Federal Education Loan    asset recovery services	$	35	$	—	$	35	$	19	$	—	$	19
Government services		—		40		40		—		41		41
Healthcare services		—		25		25		—		24		24
Total	$	35	$	65	$	100	$	19	$	65	$	84
	Six Months Ended June 30,
	2019						2018
(Dollars in millions)	Federal Education Loans		Business Processing		Total Revenue		Federal Education Loans		Business Processing		Total Revenue
Federal Education Loan    asset recovery services	$	64	$	—	$	64	$	39	$	—	$	39
Government services		—		82		82		—		94		94
Healthcare services		—		52		52		—		44		44
Total	$	64	$	134	$	198	$	39	$	138	$	177

Revenue by Client Type

	Three Months Ended June 30,
	2019						2018
(Dollars in millions)	Federal Education Loans		Business Processing		Total Revenue		Federal Education Loans		Business Processing		Total Revenue
Federal government	$	17	$	4	$	21	$	1	$	2	$	3
Guarantor agencies		14		—		14		15		—		15
Other institutions		4		—		4		3		—		3
State and local government		—		23		23		—		23		23
Tolling authorities		—		13		13		—		16		16
Hospitals and other    healthcare providers		—		25		25		—		24		24
Total	$	35	$	65	$	100	$	19	$	65	$	84
	Six Months Ended June 30,
	2019						2018
(Dollars in millions)	Federal Education Loans		Business Processing		Total Revenue		Federal Education Loans		Business Processing		Total Revenue
Federal government	$	30	$	7	$	37	$	2	$	3	$	5
Guarantor agencies		28		—		28		31		—		31
Other institutions		6		—		6		6		—		6
State and local government		—		48		48		—		49		49
Tolling authorities		—		27		27		—		42		42
Hospitals and other    healthcare providers		—		52		52		—		44		44
Total	$	64	$	134	$	198	$	39	$	138	$	177