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Revenues - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017 | Jan. 01, 2018 | Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |
Increase (decrease) in retained earnings | $ 889,189,000 |  | $ 889,189,000 |  |  | $ 833,610,000
Decrease in revenues | (655,774,000) | $ (621,745,000) | (1,929,978,000) | $ (1,783,759,000) |  |
Accrued rebates | 30,100,000 |  | 30,100,000 |  |  |
Accrued returns | 9,300,000 |  | 9,300,000 |  |  |
Estimated price adjustments, accounts receivable |  |  | 29,000,000 |  |  |
Contract with customer, deferred revenues | 90,800,000 |  | 90,800,000 |  | $ 104,400,000 |
Contract with customer, deferred revenues, current | 78,500,000 |  | 78,500,000 |  |  |
Contract with customer, deferred revenues, noncurrent | 12,300,000 |  | 12,300,000 |  |  |
Contract with customer, revenue recognized | 50,800,000 |  | 149,400,000 |  |  |
Deferred sales commission | 2,300,000 |  | 2,300,000 |  |  |
Sales commissions | 5,900,000 |  | 18,400,000 |  |  |
Accounting Standards Update 2014-09 |  |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |
Increase (decrease) in retained earnings |  |  |  |  | $ 2,600,000 |
Decrease in revenues | $ 0 |  | $ 0 |  |  |

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- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in estimate of transaction price which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130551-203045 + Details
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