Recently Adopted and Issued Accounting Standards (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales	[1],[2]	$ (820.7)	$ (770.6)	$ (2,369.4)	$ (2,194.2)
Other (expense) income, net	[1],[2]	(9.4)	11.8	(20.3)	4.7
Increase (decrease) in financing activities	[3]			(334.2)	(1,245.2)
Decrease in investing activities				211.2	(1,876.9)
Decrease in other non-current liabilities		(615.1)		(615.1)		$ (490.8)
Reduction to retained earnings		$ (1,646.7)		$ (1,646.7)		(1,735.2)
ASU 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales			14.5		15.9	16.7
Other (expense) income, net			$ 14.5		15.9	16.7
ASU 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in financing activities					1.8	(25.4)
Decrease in investing activities					$ 27.5	$ 27.5
ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of ASU 2016-16, Decrease in other assets							$ 7.5
Increase in deferred tax assets							4.8
Decrease in other non-current liabilities							1.7
Reduction to retained earnings							$ 1.0

[1] As part of our review of costs included in the corporate segment, amounts related to division operations were identified and reclassified out of other (expense) income, net to cost of sales. The impact for the three and nine months ended September 30, 2017 was $2.1 million and $5.3 million, respectively.

[2] Due to the adoption of ASU 2017-07, certain amounts related to defined benefit and other post-employment benefit plans were reclassified from cost of sales to other (expense) income, net. Refer to Note 2, "Recently Adopted and Issued Accounting Standards," in the Notes to Condensed Consolidated Financial Statements for more information.

[3] Due to the adoption of ASU 2016-18, the Company now is required to include restricted cash as part of the change in the total cash balance. As a result, amounts which were previously classified as cash flows from financing activities related to Sealed Air continuing operations and amounts which were previously classified as cash flows from investing activities related to restricted cash sold with the sale of Diversey have been reclassified as they are recognized in the total change in cash. Refer to Note 2, "Recently Adopted and Issued Accounting Standards," in the Notes to Condensed Consolidated Financial Statements for more information.