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Retirement and Deferred Compensation Plans - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) insurance_contract | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Retirement Benefits [Abstract] |  |  |
Non-service component net cost (credit) | $ 2.8 | $ 1.0 | $ (5.3)
Pension plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accumulated benefit obligation for plans that have plan assets | 390.4 | 433.0 |
Accumulated benefit obligation for plans that do not have plan assets | 86.0 | 86.7 |
Estimated net loss that will be amortized from AOCI into net periodic benefit cost during next fiscal year | 1.2 |  |
Estimated prior service cost (credit) that will be amortized from AOCI into net periodic benefit cost during next fiscal year | 0.7 |  |
Estimated employer contribution to pension plans during next fiscal year | 7.8 |  |
Pension plans | Germany |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Unfunded portion of plan | (56.4) | (61.8) |
Pension plans | Non-United States Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Unfunded portion of plan | $ 95.9 | $ 112.8 |
Expected long-term return on plan assets | 2.70% | 2.80% | 3.40%
Number of foreign plans using guaranteed insurance contracts | insurance_contract | 4 |  |
Net loss recognized in accumulated other comprehensive loss | $ 16.5 | $ 29.9 |
Prior service cost (credit) recognized in accumulated other comprehensive loss | $ 7.7 | $ 6.7 |
Discount rate used in measurement of benefit obligation (as a percent) | 2.40% | 2.10% |
Pension plans | Non-United States Plans | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected long-term return on plan assets | 1.50% |  |
Pension plans | Non-United States Plans | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected long-term return on plan assets | 3.50% |  |
Retiree health care plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Unfunded portion of plan | $ 13.7 | $ 14.9 |
Estimated prior service cost (credit) that will be amortized from AOCI into net periodic benefit cost during next fiscal year | 0.8 |  |
Net loss recognized in accumulated other comprehensive loss | 0.9 | 1.4 |
Prior service cost (credit) recognized in accumulated other comprehensive loss | $ (4.1) | $ (4.8) |
Discount rate used in measurement of benefit obligation (as a percent) | 4.20% | 3.50% |
Discount rate used in measurement of net periodic benefit cost (as a percent) | 3.20% | 4.00% | 4.30%
Health care cost trend rate assumed for next fiscal year (as a percent) | 7.30% |  |
Ultimate health care cost trend rate (as a percent) | 4.50% |  |

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- Definition For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date for the plans that do not have plan assets. + References No definition available. + Details
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- Definition Number of defined benefit plans using guaranteed insurance contracts. + References No definition available. + Details
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- Definition Net periodic defined benefit cost (reversal of cost), excluding the service cost component. + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919 + Details
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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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