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Pension and Postretirement Benefit Obligation (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | $ 461.1 |  |
Fair Value of Plan Assets (Period End) | 503.0 | $ 461.1 |
Domestic Plan [Member] |  |  |
Benefit Obligation [Roll Forward] |  |  |
Benefit obligation (period start) | 126.6 | 126.9 |
Service cost | 0.0 | 0.0 | $ 0.0
Interest cost | 5.1 | 5.9 | 0.3
Benefits Paid | (11.4) | (13.6) |
Plan participant contributions | 0.0 | 0.0 |
Actuarial losses (gains) | 5.1 | 7.4 |
Settlements and curtailments | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Other | 0.0 | 0.0 |
Benefit Obligation (Period End) | 125.4 | 126.6 | 126.9
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | 95.2 | 101.1 |
Actual return on plan assets | 12.4 | 7.7 |
Employer contributions | 2.6 | 0.0 |
Plan participant contributions | 0.0 | 0.0 |
Benefits paid | (11.4) | (13.6) |
Settlements | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Other | 0.0 | 0.0 |
Fair Value of Plan Assets (Period End) | 98.8 | 95.2 | 101.1
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (26.6) | (31.4) |
Amounts Recognized in Consolidated Balance Sheets |  |  |
Non-current asset | 0.0 | 0.0 |
Current liability | 0.0 | 0.0 |
Non-current liability | (26.6) | (31.4) |
Net liability recognized | (26.6) | (31.4) |
Accumulated benefit obligation | 125.4 | 126.6 |
Amounts recognized in Accumulated Other Comprehensive Loss, net |  |  |
Net actuarial loss | 52.2 | 54.9 |
Prior service cost (credit) | 0.0 | 0.0 |
Total amount recognized | 52.2 | 54.9 |
Net actuarial losses from AOCI into net periodic cost | 1.5 |  |
Pension plans with underfunded or unfunded accumulated benefit obligation |  |  |
Aggregate projected benefit obligation | 125.4 | 126.6 |
Aggregate accumulated benefit obligation | 125.4 | 126.6 |
Aggregate fair value of plan assets | 98.8 | 95.2 |
Foreign Plan [Member] |  |  |
Benefit Obligation [Roll Forward] |  |  |
Benefit obligation (period start) | 530.6 | 537.9 |
Service cost | 4.9 | 6.7 | 11.1
Interest cost | 13.5 | 15.1 | 18.9
Benefits Paid | (19.0) | (25.7) |
Plan participant contributions | 0.2 | 0.2 |
Actuarial losses (gains) | 20.3 | 115.6 |
Settlements and curtailments | (19.8) | (6.3) |
Foreign currency effect | 50.4 | (84.2) |
Other | 1.2 | (28.7) |
Benefit Obligation (Period End) | 582.3 | 530.6 | 537.9
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | 365.9 | 399.6 |
Actual return on plan assets | 25.1 | 47.9 |
Employer contributions | 17.5 | 23.2 |
Plan participant contributions | 0.2 | 0.2 |
Benefits paid | (19.0) | (25.7) |
Settlements | (19.1) | (2.2) |
Foreign currency effect | 33.2 | (68.6) |
Other | 0.4 | (8.5) |
Fair Value of Plan Assets (Period End) | 404.2 | 365.9 | 399.6
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (178.1) | (164.7) |
Amounts Recognized in Consolidated Balance Sheets |  |  |
Non-current asset | 9.0 | 7.6 |
Current liability | (6.5) | (5.5) |
Non-current liability | (180.6) | (166.8) |
Net liability recognized | (178.1) | (164.7) |
Accumulated benefit obligation | 577.9 | 526.2 |
Amounts recognized in Accumulated Other Comprehensive Loss, net |  |  |
Net actuarial loss | 201.6 | 183.4 |
Prior service cost (credit) | 1.1 | 0.9 |
Total amount recognized | 202.7 | 184.3 |
Net actuarial losses from AOCI into net periodic cost | 6.0 |  |
Pension plans with underfunded or unfunded accumulated benefit obligation |  |  |
Aggregate projected benefit obligation | 576.6 | 525.3 |
Aggregate accumulated benefit obligation | 575.2 | 523.8 |
Aggregate fair value of plan assets | 389.5 | 352.9 |
Other Postretirement Benefits Plan [Member] |  |  |
Benefit Obligation [Roll Forward] |  |  |
Benefit obligation (period start) | 32.3 | 33.9 |
Service cost | 0.0 | 0.0 | 0.0
Interest cost | 1.3 | 1.5 | 1.5
Benefits Paid | (5.9) | (5.8) |
Plan participant contributions | 1.6 | 1.6 |
Actuarial losses (gains) | 2.5 | 1.1 |
Settlements and curtailments | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Other | 0.0 | 0.0 |
Benefit Obligation (Period End) | 31.8 | 32.3 | 33.9
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | 0.0 | 0.0 |
Actual return on plan assets | 0.0 | 0.0 |
Employer contributions | 4.3 | 4.2 |
Plan participant contributions | 1.6 | 1.6 |
Benefits paid | (5.9) | (5.8) |
Settlements | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Other | 0.0 | 0.0 |
Fair Value of Plan Assets (Period End) | 0.0 | 0.0 | $ 0.0
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (31.8) | (32.3) |
Amounts Recognized in Consolidated Balance Sheets |  |  |
Non-current asset | 0.0 | 0.0 |
Current liability | (3.1) | (3.2) |
Non-current liability | (28.7) | (29.1) |
Net liability recognized | (31.8) | (32.3) |
Amounts recognized in Accumulated Other Comprehensive Loss, net |  |  |
Net actuarial loss | 4.2 | 1.7 |
Prior service cost (credit) | (0.4) | (0.6) |
Total amount recognized | 3.8 | $ 1.1 |
Other Foreign Pension Plans |  |  |
Fair Value of Plan Assets [Roll Forward] |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan | $ 56.2 |  |

X
- 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, before tax, of accumulated other comprehensive (income) loss for 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 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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- Definition Amount, before 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 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 Amount, before 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 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 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive 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 (a)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. + References Reference 1: 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 Reference 2: 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 + Details
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- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. + 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 3 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1731-114919 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: 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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(10)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. 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://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of contributions received by defined benefit plan from participant which increases plan assets. + 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 (b)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets 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 (b)(2) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for 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 (h)(1) -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 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. + 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 (d)(5)(ii) -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 50 -Paragraph 1 -Subparagraph (d)(5)(iv)(01) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(8) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1731-114919 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: 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 Reference 4: 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 + Details
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1731-114919 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: 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 4: 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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