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Comprehensive Income (Loss) and Equity - Narrative (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 129 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 06, 2021 | Mar. 31, 2020 | Oct. 02, 2021 | Jul. 03, 2021 | Apr. 03, 2021 | Dec. 31, 2020 | Oct. 03, 2020 | Oct. 02, 2021 | Oct. 03, 2020 | Oct. 02, 2021 | Apr. 02, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments related to intercompany transactions gains (losses) |  |  | $ 200,000 |  |  |  | $ 500,000 | $ (400,000) | $ (500,000) |  |
Aggregate purchases authorized under common stock share repurchase program |  |  |  |  |  |  |  |  |  |  | $ 6,100,000,000
Aggregate repurchases |  |  | $ 69,100,000 |  |  |  |  | $ 100,300,000 | $ 70,000,000.0 | $ 4,800,000,000 |
Average price (in dollars per share) |  |  | $ 164.56 |  |  |  |  | $ 170.03 | $ 109.22 | $ 90.97 |
Cash dividends declared per share (in dollars per share) |  | $ 0.77 | $ 0.50 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0 | $ 1.00 | $ 0.77 |  |
Shenyang Lear Automotive Seating and Interior Systems Co., Ltd |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sale of stock percentage of ownership | 49.00% |  |  |  |  |  |  |  |  |  |
Proceeds from sale of equity method investments | $ 36,200,000 |  |  |  |  |  |  |  |  |  |
Equity method investment | $ 7,600,000 |  |  |  |  |  |  |  |  |  |

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