Stockholders' Deficit - Number of PSUs Granted Based on Return on Invested Capital and Grant Date Fair Value (Details)	12 Months Ended
Dec. 31, 2019 $ / shares shares
Equity [Abstract]
Number of units granted \| shares	92,804
Weighted average fair value on grant date (in usd per share) \| $ / shares	$ 42.45

Performance Stock Units Granted Based On Return On Investment Capital and Grant Date Fair Value, Weighted Average Fair Value and Grant Date Fair Value

No definition available.

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Namespace Prefix:	see_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration