Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Goodwill activity:
Balance at beginning of year	$ 2,418.7
Foreign currency translation	(24.0)
Balance at end of year	2,394.7
Intangible Assets Gross, Excluding Goodwill	7,127.8	7,338.8
Canada [Member]
Goodwill [Line Items]
Percentage Of Fair Value Exceeding Carrying Value	16.00%
Goodwill activity:
Balance at beginning of year	718.2
Foreign currency translation	(27.7)
Balance at end of year	690.5
Europe [Member]
Goodwill [Line Items]
Percentage Of Fair Value Exceeding Carrying Value	11.00%
Goodwill activity:
Balance at beginning of year	1,693.2
Foreign currency translation	3.5
Balance at end of year	1,696.7
MCI [Member]
Goodwill activity:
Balance at beginning of year	7.3
Foreign currency translation	0.2
Balance at end of year	$ 7.5