Goodwill And Other Intangible Assets (Narrative) (Details) $ in Millions		12 Months Ended
	Dec. 31, 2017 USD ($) Reporting_Unit	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Goodwill [Line Items]
Reporting units for goodwill impairment testing | Reporting_Unit	8
Goodwill	$ 25,138.6	$ 25,138.6	$ 23,826.9	$ 21,014.9
Impairment loss		$ 0.0	0.0	0.0
Finite-lived intangible assets, weighted-average life (in years)		9 years
Total intangible amortization expense		$ 661.0	$ 583.0	$ 397.0
Future amortization expense, year one	682.0	682.0
Future amortization expense, year two	675.0	675.0
Future amortization expense, year three	669.0	669.0
Future amortization expense, year four	656.0	656.0
Future amortization expense, year five	637.0	637.0
Minimum
Goodwill [Line Items]
Goodwill	509.0	509.0
Maximum
Goodwill [Line Items]
Goodwill	$ 12,200.0	$ 12,200.0