Goodwill (Details) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2017
USD ($)
|
Sep. 30, 2016
USD ($)
|
Sep. 30, 2017
USD ($)
segment
|
Sep. 30, 2016
USD ($)
|
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||
| Number of reportable segments | segment | 1 | |||
| Business Acquisition [Line Items] | ||||
| Impairment losses for goodwill | $ 0 | $ 0 | $ 0 | $ 0 |
| Accumulated impairment of goodwill since the merger | $ 4,766,190,000 | 4,766,190,000 | ||
| Automatic | ||||
| Business Acquisition [Line Items] | ||||
| Goodwill acquired during period | $ 81,452,000 | |||
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. No definition available.
|
| X | ||||||||||
- Details
|