Long-lived Assets (Schedule of Intangible Assets Subject to Amortization, Net) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Gross carrying amount	$ 8,271.8	$ 8,404.8
Accumulated amortization	(2,711.3)	(2,609.4)
Net carrying amount	5,560.5	5,795.4
Customer Relationships [Member]
Gross carrying amount	8,005.8	8,116.7
Accumulated amortization	(2,577.3)	(2,458.4)
Net carrying amount	5,428.5	5,658.3
Other Intangible Assets [Member]
Gross carrying amount	266.0	288.1
Accumulated amortization	(134.0)	(151.0)
Net carrying amount	$ 132.0	$ 137.1