Segment Reporting Total Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total assets	$ 14,833.4	$ 15,580.1
Canada [Member]
Segment Reporting Information [Line Items]
Total assets	5,875.7	6,103.2
U.S. [Member]
Segment Reporting Information [Line Items]
Total assets	2,580.1	2,506.5
Europe [Member]
Segment Reporting Information [Line Items]
Total assets	6,095.4	6,547.7
MCI [Member]
Segment Reporting Information [Line Items]
Total assets	80.6	83.3
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets	$ 201.6	$ 339.4