Pension and Other Benefits - Narrative (Details) - Foreign Plan $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan estimated total employer contributions in current fiscal year	$ 0.5
Contributions by employer	$ 0.1

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration