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Revenue from Contracts with Customers Accounted for in Accordance with ASC 606 - Summary of Disaggregation of Revenue from Contracts with Customers Accounted Under ASC 606 (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | $ 134 | $ 85 | $ 264 | $ 173
Federal Government [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 6 | 14 | 15 | 37
Guarantor Agencies [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 4 | 9 | 8 | 21
Other Institutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue |  | 1 |  | 1
State and Local Government [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 46 | 29 | 88 | 45
Tolling Authorities [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 14 | 11 | 27 | 24
Hospitals and Other Healthcare Providers [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 64 | 21 | 126 | 45
Federal Education Loans [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 4 | 21 | 9 | 51
Federal Education Loans [Member] | Federal Government [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue |  | 11 | 1 | 29
Federal Education Loans [Member] | Guarantor Agencies [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 4 | 9 | 8 | 21
Federal Education Loans [Member] | Other Institutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue |  | 1 |  | 1
Business Processing [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 130 | 64 | 255 | 122
Business Processing [Member] | Federal Government [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 6 | 3 | 14 | 8
Business Processing [Member] | State and Local Government [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 46 | 29 | 88 | 45
Business Processing [Member] | Tolling Authorities [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 14 | 11 | 27 | 24
Business Processing [Member] | Hospitals and Other Healthcare Providers [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 64 | 21 | 126 | 45
Federal Education Loan Asset Recovery Services [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 4 | 21 | 9 | 51
Federal Education Loan Asset Recovery Services [Member] | Federal Education Loans [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 4 | 21 | 9 | 51
Government Services [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 66 | 43 | 129 | 77
Government Services [Member] | Business Processing [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 66 | 43 | 129 | 77
Healthcare Services [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | 64 | 21 | 126 | 45
Healthcare Services [Member] | Business Processing [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total Revenue | $ 64 | $ 21 | $ 126 | $ 45

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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