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Long-Lived Assets - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 06, 2021 | Oct. 02, 2021 | Oct. 03, 2020 | Oct. 02, 2021 | Oct. 03, 2020
Property, Plant and Equipment [Line Items] |  |  |  |  |
Depreciation expense |  | $ 124.6 | $ 120.0 | $ 374.0 | $ 347.7
Asset impairment charges |  |  |  | 2.0 | 3.4
Amortization of intangible assets |  | $ 15.8 | $ 16.3 | 57.4 | 49.4
Impairment loss |  |  |  | 1.0 |
Affiliated Entity |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Impairment loss |  |  |  | 1.0 |
Shenyang Jinbei Lear Auto Parts Co., Ltd |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Equity method investment, ownership percentage | 49.00% |  |  |  |
Payments to acquire equity method investments | $ 41.3 |  |  |  |
E-Systems |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Asset impairment charges |  |  |  | 8.5 |
Restructuring Charges |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Asset impairment charges |  |  |  | $ 1.0 | $ 12.5

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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