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Employee Benefit Plans (Notes) | 6 Months Ended
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Jun. 30, 2020
Employee Benefit Plans [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | Employee Benefit Plans We have funded and unfunded defined benefit plans covering certain employee groups in the U.S. and various European countries. Local statutory requirements govern many of our European plans. The defined benefit plans are mostly closed to new participants and, in some cases, existing participants no longer accrue benefits. As of each of June 30, 2020 and December 31, 2019, the aggregate funded status of the defined benefit plans was a liability of $142 million, and is reported in Other noncurrent liabilities and Accrued payroll-related liabilities on our Unaudited Condensed Consolidated Balance Sheets. On June 28, 2019, we approved an amendment to terminate our primary defined benefit plan in the U.S. (the "U.S. Plan") and to freeze all related benefit accruals, effective June 30, 2019. U.S. Plan participants will receive their full accrued benefits from plan assets by electing either lump sum distributions or annuity contracts with a qualifying third-party annuity provider. The resulting settlement effect of the U.S. Plan termination will be determined based on prevailing market conditions, the lump sum offer participation rate of eligible participants, the actual lump sum distributions, and annuity purchase rates at the date of distribution. During the quarter ended June 30, 2020, participants were able to elect lump-sum distributions. As a result of these elections and subsequent payments, we reclassified $2 million of unrealized loss from Accumulated Other Comprehensive Income to Other income, net in our Unaudited Condensed Consolidated Statements of Income as of June 30, 2020 to reflect the partial settlement of the plan. We expect to settle the remaining obligations under the plan by the end of 2020 through the purchase of annuity contracts. Actuarial valuations to support settlement entries will be completed upon the finalization of lump sum distributions during the third quarter of 2020 and then additionally in the fourth quarter upon the purchase of annuity contracts. We expect that these valuations will result in additional charges recognized through Other income, net, but are unable to quantify them at this time. Net periodic benefit cost for our defined benefit plans included the following components for the three and six months ended June 30, 2020 and 2019 (in thousands):
| Three Months Ended |  |  |  | Six Months Ended |  |
| June 30, |  |  |  | June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | $ | 856 |  |  | $ | 1,074 |  |  | $ | 1,526 |  |  | $ | 1,661 |
Interest cost | 731 |  |  | 1,010 |  |  | 1,449 |  |  | 1,995 |
Expected return on plan assets | (662) |  |  | (560) |  |  | (1,140) |  |  | (1,340) |
Amortization of actuarial loss | 555 |  |  | 37 |  |  | 669 |  |  | 290 |
Settlement loss | 2,100 |  |  | — |  |  | 2,100 |  |  | — |
Net periodic benefit cost | $ | 3,580 |  |  | $ | 1,561 |  |  | $ | 4,604 |  |  | $ | 2,606 |
For the three and six months ended June 30, 2020 and 2019, the service cost component of net periodic benefit cost was classified in Selling, general and administrative expenses, while the other components of net periodic benefit cost were classified in Other income, net in our Unaudited Condensed Consolidated Statements of Income.

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- Definition Employee Benefit Plans [Abstract] + References No definition available. + Details
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