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Reconciliation of Total Segment Adjusted EBITDA to Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total Segment Adjusted EBITDA	$ 317.0	$ 183.6
Interest expense	(53.2)	(25.5)
Depreciation and amortization	(127.8)	(56.2)
Restructuring and acquisition-related costs	(18.3)	(16.0)
Debt refinancing and redemption costs	(10.3)	0.0
Income before income taxes	$ 107.4	$ 85.9

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Costs incurred for restructuring initiatives as well as expenses directly related to acquisition activity.

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Segment Adjusted EBITDA is defined as earnings before interest, income taxes, depreciation and amortization for our reportable segments, excluding the impact of restructuring and acquisition-related costs, debt refinancing and redemption costs and non-recurring items

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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-Section 45
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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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