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Revenues - Information about Operations in Different Geographic Areas (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 4,540,029 | $ 5,158,557 | $ 4,845,872
United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 2,330,126 | 2,683,686 | 2,397,332
United Kingdom |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 171,627 | 196,908 | 196,590
European Union countries |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 696,087 | 826,355 | 788,579
Asia |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 959,519 | 959,569 | 985,182
Other foreign countries |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 382,670 | 492,039 | 478,189
International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 2,209,903 | 2,474,871 | 2,448,540
Non-US |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,196,400 | 1,306,200 | 1,269,400
EIG |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 2,989,928 | 3,322,881 | 3,028,959
EIG | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,513,967 | 1,685,369 | 1,446,974
EIG | United Kingdom |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 54,158 | 64,423 | 61,513
EIG | European Union countries |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 371,884 | 434,072 | 389,032
EIG | Asia |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 769,532 | 773,034 | 780,135
EIG | Other foreign countries |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 280,387 | 365,983 | 351,305
EIG | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,475,961 | 1,637,512 | 1,581,985
EMG |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,550,101 | 1,835,676 | 1,816,913
EMG | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 816,159 | 998,317 | 950,358
EMG | United Kingdom |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 117,469 | 132,485 | 135,077
EMG | European Union countries |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 324,203 | 392,283 | 399,547
EMG | Asia |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 189,987 | 186,535 | 205,047
EMG | Other foreign countries |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 102,283 | 126,056 | 126,884
EMG | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 733,942 | $ 837,359 | $ 866,555

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