Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |
---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2018 |
Dec. 31, 2017 |
|
Accounting Policies [Abstract] | |||
Revenue, remaining obligation, expected timing of satisfaction | three to six months, | ||
Contract liability | $ 181 | $ 181 | $ 181 |
Contract liabilities, current portion | 154 | 154 | $ 150 |
Revenue recognized, previously recorded as deferred revenue | $ 26 | $ 128 |
X | ||||||||||
- References No definition available.
|
X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Description of when remaining performance obligation is expected to be recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|