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Commitments and Contingencies - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Commitments And Contingencies [Line Items] |  |
Period over which product liability self-insurance retention levels have fluctuated (in years) | 10 years |
Product liability reserves | $ 9,200,000 | $ 12,800,000
Warranty claims reserves | 63,200,000 | 60,600,000
Gain on settlement |  | 24,400,000
Other Income (Expense) |  |
Commitments And Contingencies [Line Items] |  |
Gain on settlement |  | 15,500,000
Engineering, Selling and Administrative Expenses |  |
Commitments And Contingencies [Line Items] |  |
Gain on settlement |  | $ 8,900,000
Maximum |  |
Commitments And Contingencies [Line Items] |  |
Product liability self-insurance maximum retention level for new occurrence | $ 3,000,000.0 |

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(5) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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