Loans and Interest Receivable - Delinquency Status of the Principal Amount of Loans and Interest Receivables (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019 |
Consumer Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, current | $ 1,327 | $ 1,279 |
Loans, advances, and interest receivable | $ 1,377 | $ 1,322 |
Loans, advances, and interest receivable, current, percentage | 96.40% | 96.70% |
Loans, advances, and interest receivable, percentage | 100.00% | 100.00% |
Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, current | $ 2,682 | $ 2,523 |
Loans, advances, and interest receivable, past due | | 293 |
Loans, advances, and interest receivable | $ 2,995 | $ 2,816 |
Loans, advances, and interest receivable, current, percentage | 89.60% | 89.60% |
Loans, advances, and interest receivable, past due, percentage | | 10.40% |
Loans, advances, and interest receivable, percentage | 100.00% | 100.00% |
30 - 59 Days Past Due | Consumer Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 18 | $ 15 |
Loans, advances, and interest receivable, past due, percentage | 1.30% | 1.10% |
30 - 59 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 120 | $ 115 |
Loans, advances, and interest receivable, past due, percentage | 4.00% | 4.10% |
60 - 89 Days Past Due | Consumer Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 11 | $ 9 |
Loans, advances, and interest receivable, past due, percentage | 0.80% | 0.70% |
60 - 89 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 67 | $ 61 |
Loans, advances, and interest receivable, past due, percentage | 2.20% | 2.10% |
90 - 180 Days Past Due | Consumer Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 21 | $ 19 |
Loans, advances, and interest receivable, past due, percentage | 1.50% | 1.50% |
90 - 180 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 109 | $ 100 |
Loans, advances, and interest receivable, past due, percentage | 3.60% | 3.60% |
More Than 180 Days | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 17 | $ 17 |
Loans, advances, and interest receivable, past due, percentage | 0.60% | 0.60% |
Financial Asset, 2020 Origination | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, current | $ 1,388 | |
Loans, advances, and interest receivable | 1,408 | |
Financial Asset, 2020 Origination | 30 - 59 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 17 | |
Financial Asset, 2020 Origination | 60 - 89 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 3 | |
Financial Asset, 2020 Origination | 90 - 180 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2020 Origination | More Than 180 Days | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2019 Origination | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, current | 1,266 | |
Loans, advances, and interest receivable | 1,513 | |
Financial Asset, 2019 Origination | 30 - 59 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 90 | |
Financial Asset, 2019 Origination | 60 - 89 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 56 | |
Financial Asset, 2019 Origination | 90 - 180 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 94 | |
Financial Asset, 2019 Origination | More Than 180 Days | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 7 | |
Financial Asset, 2018 Origination | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, current | 28 | |
Loans, advances, and interest receivable | 73 | |
Financial Asset, 2018 Origination | 30 - 59 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 13 | |
Financial Asset, 2018 Origination | 60 - 89 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 8 | |
Financial Asset, 2018 Origination | 90 - 180 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 15 | |
Financial Asset, 2018 Origination | More Than 180 Days | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 9 | |
Financial Asset, 2017 Origination | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, current | 0 | |
Loans, advances, and interest receivable | 1 | |
Financial Asset, 2017 Origination | 30 - 59 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2017 Origination | 60 - 89 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2017 Origination | 90 - 180 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2017 Origination | More Than 180 Days | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 1 | |
Financial Asset, 2016 Origination | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, current | 0 | |
Loans, advances, and interest receivable | 0 | |
Financial Asset, 2016 Origination | 30 - 59 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2016 Origination | 60 - 89 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2016 Origination | 90 - 180 Days Past Due | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | 0 | |
Financial Asset, 2016 Origination | More Than 180 Days | Merchant Receivables | | |
Financing Receivable, Past Due [Line Items] | | |
Loans, advances, and interest receivable, past due | $ 0 | |