Goodwill & Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Reporting_Unit	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Reporting units for goodwill impairment testing	22
Goodwill	$ 16,038.2	$ 15,462.0	$ 14,474.3
Finite-lived intangible assets, weighted-average life, years	14 years
Total intangible amortization expense	365	342	284
Future amortization expense, year one	376
Future amortization expense, year two	339
Future amortization expense, year three	305
Future amortization expense, year four	274
Future amortization expense, year five	247
Minimum
Goodwill [Line Items]
Goodwill	7.0
Maximum
Goodwill [Line Items]
Goodwill	$ 4,400.0