Supplemental Balance Sheet Data - Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Deferred Debt Issuance Costs, Net of Amortization of $14.1 million and $12.5 million for 2019 and 2018, respectively	$ 4.8	$ 6.4
Deferred Income Tax Assets	3.0	8.3
Pension Assets	25.6	19.0
Contract Assets, noncurrent portion	13.9	9.8
Fair Value of Derivatives, noncurrent portion	0.0	0.1
Operating Lease Right-of-Use Asset	202.8
Other	23.6	24.7
Total	273.7	68.3
Accumulated amortization of debt issuance costs	$ 14.1	$ 12.5

Amount of accumulated amortization of debt issuance costs related to line of credit arrangements.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as noncurrent.

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Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of lessee's right to use underlying asset under operating lease.

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