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Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Fair Values of Pension Plan Assets, by Asset Category and Level of Fair Values (Parenthetical) (Detail) (U.S. Pension Plans [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013
U.S. Pension Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Minimum percentage of invested in real estate funds | 90.00%
Maximum amount invested in alternative investments | $ 0.5

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- Definition Maximum amount invested in alternative investments. + References No definition available. + Details
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Period Type: | duration

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- Definition Minimum percentage of invested in real estate funds. + References No definition available. + Details
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Namespace Prefix: | see_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Balance Type: | na
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