Condensed Consolidated Statements of Cash Flows (Parenthetical) $ in Millions	9 Months Ended
Sep. 30, 2016 USD ($)
Statement Of Cash Flows [Abstract]
New accounting pronouncement early adoption on retrospective basis resulted in increase (decrease) in operating cash flow	$ 6.8
New accounting pronouncement early adoption on retrospective basis resulted in increase (decrease) in financing activities	$ (6.8)

New accounting pronouncement early adoption on retrospective basis resulted in increase (decrease) in financing activities.

No definition available.

Name:	see_NewAccountingPronouncementEarlyAdoptionOnRetrospectiveBasisResultedInIncreaseDecreaseInFinancingActivities
Namespace Prefix:	see_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration