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Acquisition (Details) - USD ($) $ in Millions |  | 9 Months Ended |
--- | --- | --- | ---
Jan. 03, 2017 | Sep. 30, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 2,309 | $ 1,219
SquareTrade |  |  |
Business Acquisition [Line Items] |  |  |
Consideration transferred | $ 1,400 |  |
Goodwill | 1,080 | 1,090 |
Commissions paid to retailers | 70 |  |
Intangible assets | 555 |  |
Prepaid contractual liability insurance policy premium expenses | 201 |  |
Unearned premiums | 373 |  |
Net deferred income tax liability | $ 140 |  |
Goodwill, period increase |  | 14 |
Restricted cash |  | $ 30 |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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