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Employee Benefits - Changes in Postretirement Benefit Obligation and Plan Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Postretirement Benefit Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | $ 59,625 | $ 82,714 |
Service cost for benefits earned(1) | 568 | 755 | $ 718
Interest cost on projected benefit obligation(2) | 2,265 | 2,460 | 2,710
Actuarial (gain) loss | 3,941 | (6,677) |
Plan amendments | 0 | (14,862) |
Adjustments for expense/tax contained in service cost | 0 | 0 |
Plan participants’ contributions | 437 | 435 |
Benefits paid | (2,662) | (5,200) |
Curtailments / settlements | 0 | 0 |
Translation adjustments | 0 | 0 |
Acquisitions/Transferred Liabilities | 0 | 0 |
Other | 0 | 0 |
Benefit obligation at end of year | 64,174 | 59,625 | 82,714
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Employer contributions | 2,700 |  |
U.S Plans [Member] |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at end of year | 602,408 |  |
U.S Plans [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 562,043 | 602,783 |
Service cost for benefits earned(1) | 1,378 | 1,971 | 2,175
Interest cost on projected benefit obligation(2) | 21,954 | 19,393 | 20,075
Actuarial (gain) loss | 68,839 | (33,284) |
Plan amendments | 0 | 0 |
Adjustments for expense/tax contained in service cost | 0 | 0 |
Plan participants’ contributions | 0 | 0 |
Benefits paid | (33,560) | (32,093) |
Curtailments / settlements | 0 | 0 |
Translation adjustments | 0 | 0 |
Acquisitions/Transferred Liabilities | 0 | 3,273 |
Other | 0 | 0 |
Benefit obligation at end of year | 620,654 | 562,043 | 602,783
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 532,381 | 581,917 |
Actual return on plan assets | 99,904 | (23,339) |
Employer contributions | 3,683 | 3,524 |
Plan participants’ contributions | 0 | 0 |
Benefits paid | (33,560) | (32,093) |
Settlements | 0 | 0 |
Translation adjustments | 0 | 0 |
Acquisitions/Transferred Assets | 0 | 2,372 |
Other | 0 | 0 |
Fair value of plan assets at end of year | 602,408 | 532,381 | 581,917
Funded status at end of year | (18,246) | (29,662) |
Non-U.S. Plans [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 957,935 | 973,061 |
Service cost for benefits earned(1) | 19,319 | 18,738 | 18,652
Interest cost on projected benefit obligation(2) | 17,775 | 17,704 | 17,116
Actuarial (gain) loss | 119,891 | (29,433) |
Plan amendments | 0 | 2,776 |
Adjustments for expense/tax contained in service cost | (1,333) | (1,290) |
Plan participants’ contributions | 2,803 | 2,047 |
Benefits paid | (28,977) | (33,862) |
Curtailments / settlements | (3,455) | (2,751) |
Translation adjustments | 13,935 | (49,027) |
Acquisitions/Transferred Liabilities | 0 | 48,356 |
Other | 1,191 | 11,616 |
Benefit obligation at end of year | 1,099,084 | 957,935 | 973,061
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 896,782 | 929,810 |
Actual return on plan assets | 100,163 | 6,699 |
Employer contributions | 20,031 | 18,238 |
Plan participants’ contributions | 2,803 | 2,047 |
Benefits paid | (28,977) | (33,862) |
Settlements | (3,455) | (1,564) |
Translation adjustments | 16,982 | (47,247) |
Acquisitions/Transferred Assets | 0 | 21,672 |
Other | 954 | 989 |
Fair value of plan assets at end of year | 1,005,283 | 896,782 | $ 929,810
Funded status at end of year | $ (93,801) | $ (61,153) |

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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