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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule Of Employee Benefit Plans [Line Items] |  |  |
Tax-deferred contributions, description of plan | The Company also maintains certain unfunded nonqualified supplemental benefit plans that allow participants to (i) make tax-deferred contributions and (ii) receive Company-provided matching allocations that cannot be made under the 401(k) Plan because of IRS limitations. The investment alternatives and returns are based on certain market-rate investment alternatives under the 401(k) Plan, net of expenses. |  |
Supplemental benefit plan liabilities | $ 431.2 | $ 435.0 |
Derivative contracts, reasons for holding derivative instruments | The Company has entered into derivative contracts to hedge market-driven changes in certain of the liabilities. |  |
Investment, indexed to Market Indices Fair Value | $ 180.4 |  |
Derivative contracts, disclosure of the effect on the results of operations | Changes in liabilities for these nonqualified plans and in the fair value of the derivatives are recorded primarily in Selling, general & administrative expenses. Changes in fair value of the derivatives indexed to the Company’s stock are recorded in the income statement because the contracts provide the counterparty with a choice to settle in cash or shares. |  |
Maximum |  |  |
Schedule Of Employee Benefit Plans [Line Items] |  |  |
Participants' future contributions to the 401(k) feature and the discretionary employer matching contribution feature | 20.00% |  |
U.S. |  |  |
Schedule Of Employee Benefit Plans [Line Items] |  |  |
Profit sharing and savings plan costs | $ 37.0 | 30.4 | $ 18.0
Outside the U.S. |  |  |
Schedule Of Employee Benefit Plans [Line Items] |  |  |
Profit sharing and savings plan costs | 36.6 | 35.3 | $ 33.7
Total liabilities for international retirement plans | $ 45.5 | $ 42.3 |

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