Segment Reporting Total Assets (Details) (USD $) In Millions, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Segment Reporting Information [Line Items]
Total assets	$ 15,942.7	$ 16,212.2
Canada [Member]
Segment Reporting Information [Line Items]
Total assets	6,375.4	6,547.1
U.S.
Segment Reporting Information [Line Items]
Total assets	2,530.4	2,431.8
Europe [Member]
Segment Reporting Information [Line Items]
Total assets	6,464.1	6,742.4
MCI
Segment Reporting Information [Line Items]
Total assets	91.8	92.0
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 481.0	$ 398.9