Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	$ (441.4)	$ (293.8)	$ (530.3)		$ (421.2)
Hedge instruments	0.3	(1.3)	5.0		(2.0)
Defined benefit postretirement plans	(234.6)	(197.6)	(198.1)		(189.9)
Other	1.6	2.7	1.3		2.9
Accumulated other comprehensive loss	(674.1)	(490.0)	(722.1)		$ (610.2)
Cumulative Effect of New Accounting Principle in Period of Adoption				$ (14.0)
Comprehensive (loss) income before reclassifications, Foreign currency translation adjustments	(152.8)	236.5	(109.1)
Comprehensive (loss) income before reclassifications, Hedge instruments	(1.7)	(4.5)	8.0
Comprehensive (loss) income before reclassifications, Defined benefit postretirement plans	(41.9)	(5.0)	(11.4)
Comprehensive (loss) income before reclassifications, Other	(1.1)	1.4	(1.6)
Comprehensive (loss) income before reclassifications, Total	(197.5)	228.4	(114.1)
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	5.2
Income taxes associated with comprehensive (loss) income before reclassifications, Hedge instruments	0.2	1.0	(0.7)
Income taxes associated with comprehensive (loss) income before reclassifications, Defined benefit postretirement plans	13.5	(0.5)	(2.6)
Income taxes associated with comprehensive (loss) income before reclassifications, Total	18.9	0.5	(3.3)
Reclassification from accumulated other comprehensive (loss) income, Hedge instruments	3.9	(3.8)	0.1
Reclassification from accumulated other comprehensive (loss) income, Defined benefit postretirement plans	7.5	8.5	8.3
Reclassification from accumulated other comprehensive (loss) income, Total	11.4	4.7	8.4
Income taxes reclassified into net earnings, Hedge instruments	(0.8)	1.0	(0.4)
Income taxes reclassified into net earnings, Defined benefit postretirement plans	(2.1)	(2.5)	(2.5)
Income taxes reclassified into net earnings, Total	$ (2.9)	$ (1.5)	$ (2.9)

Other Comprehensive Income (Loss), Adjusments before Reclassification Adjustments and Tax

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Other Comprehensive Income (Loss) Before Reclassification Adjustments, Tax

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Other Comprehensive Income (Loss) Reclassification Adjustment Tax

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Other Comprehensive Income (Loss) Reclassification Adjustments Before Tax

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Accumulated unrealized gain (loss), after tax, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount of tax expense (benefit), before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification.

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Amount, before tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net period benefit cost (credit) of defined benefit plan.

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Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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