Pensions Net Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Plans, Defined Benefit [Member]
Components of Net Periodic Benefit Cost (Income) [Abstract]
Settlement/curtailment loss				$ 30.0
Domestic Pension Benefits [Member]
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost (Income) [Abstract]
Discount rate		4.25%	4.00%	4.46%
Average rate of increase in employee compensation		4.00%	4.00%	4.00%
Expected long-term rate of return on assets		7.00%	7.00%	7.00%
Components of Net Periodic Benefit Cost (Income) [Abstract]
Service cost-benefits earned				$ 2.0
Interest cost on benefit obligation		$ 51.1	$ 50.0	53.1
Expected return on plan assets		(49.6)	(54.3)	(60.8)
Amortization of actuarial net loss		0.3	0.6	3.7
Settlement/curtailment loss				25.5
Net periodic benefit cost (income)		$ 1.8	$ (3.7)	$ 23.5
Non-U.S. Pension Benefits [Member]
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost (Income) [Abstract]
Discount rate		2.83%	2.69%	3.91%
Average rate of increase in employee compensation		3.06%	3.03%	3.22%
Expected long-term rate of return on assets		3.74%	4.21%	4.88%
Components of Net Periodic Benefit Cost (Income) [Abstract]
Service cost-benefits earned		$ 23.9	$ 25.2	$ 20.0
Interest cost on benefit obligation		27.1	27.6	36.7
Expected return on plan assets		(28.2)	(33.6)	(34.4)
Amortization of actuarial net loss		7.1	9.3	4.2
Amortization of prior service benefit		(0.2)	(0.2)	(0.1)
Settlement/curtailment loss		0.7	1.0	4.1
Special termination benefits			1.3	0.3
Net periodic benefit cost (income)		30.4	30.6	$ 30.8
Postretirement Benefits [Member]
Components of Net Periodic Benefit Cost (Income) [Abstract]
Service cost-benefits earned		0.5	0.6
Interest cost on benefit obligation		$ 2.0	$ 1.9
Reduction in Interest and Service Cost Associated with Change in Estimate Method [Member] \| Scenario, Forecast [Member]
Components of Net Periodic Benefit Cost (Income) [Abstract]
Net periodic benefit cost (income)	$ (10.0)

The amount of gains or losses recognized in net periodic benefit cost.

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- Definition

The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

+ 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=65897934&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Prior Service Cost
-URI http://asc.fasb.org/extlink&oid=49177896

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- Definition

The interest rate used to adjust for the time value of money.

+ References

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Long-Term Rate of Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512046

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

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- Definition

If applicable, the cost of providing special or contractual termination benefits recognized during the period on the projected benefit obligation.

+ References

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512171

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ 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)(2)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
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-Paragraph 1
-Subparagraph (h)
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- References

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- Definition

Amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

+ References

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

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- References

No definition available.

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