Operating Leases (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012
Guarantees
Operating leases residual value guarantee	$ 25.0

A guarantee by a lessee as of the balance sheet date of the residual value of Long lived, depreciable assets owned by the guaranteed party. The guarantee is desinged to penalize the lessee for early termination of a lease.

No definition available.

Name:	bco_OperatingLeasesResidualValueGuarantee
Namespace Prefix:	bco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant