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Pension and Non-pension Post-employment Benefit Plans - Market Value of Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Employee Benefits [Abstract] |  |
Debt investment funds | $ 10.2 | $ 225.2
Equity investment funds | 6.6 | 7.0
Insurance annuities | 266.5 | 148.5
Other | 9.7 | 14.8
Total | $ 293.0 | $ 395.5
Debt investment funds, allocation percentage | 4.00% | 57.00%
Equity investment funds, allocation percentage | 2.00% | 2.00%
Insurance annuities, allocation percentage | 91.00% | 37.00%
Other, allocation percentage | 3.00% | 4.00%
Total, allocation percentage | 100.00% | 100.00%

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- Definition The amount that instruments representing debt (rather than equity) constitute of the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 142 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_142_c&doctype=Standard -URIDate 2017-03-09 + Details
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