Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Loss contingencies
Number of sites for state law proceedings under environmental matters	17
Number of sites for proceedings under environmental matters in Brazil	1
TaxAssessmentForGoodwillAmortization	$ 14.3

Represents the number of sites for state law proceedings under environmental matters.

No definition available.

Name:	bms_NumberOfSitesForStateLawProceedingsUnderEnvironmentalMatters
Namespace Prefix:	bms_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration