Summary of Total Assets by Segment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Assets	$ 17,114.2	$ 15,949.0
Segment, Continuing Operations
Segment Reporting Information [Line Items]
Assets	16,677.7	15,949.8
Segment, Continuing Operations | Construction and Do It Yourself
Segment Reporting Information [Line Items]
Assets	7,678.0	7,499.5
Segment, Continuing Operations | Securities Industry
Segment Reporting Information [Line Items]
Assets	5,577.4	5,167.4
Segment, Continuing Operations | Industrial Segment
Segment Reporting Information [Line Items]
Assets	3,422.3	3,282.9
Segment, Continuing Operations | Corporate assets
Segment Reporting Information [Line Items]
Assets	$ 436.5	$ (0.8)