Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of year	$ 992.2	$ 990.2	$ 728.5
Additions based on tax positions related to the current year	53.0	80.0	73.3
Additions for tax positions of prior years	39.8	154.3	135.3
Reductions for tax positions of prior years	(14.5)	(7.0)	(10.0)
Acquisitions, divestitures and other	13.4	(41.5)	140.6
Lapse of statute of limitations	(246.7)	(124.0)	(26.3)
Settlements	(124.8)	(45.3)	(18.9)
Effect of foreign currency translation	24.4	(14.5)	(32.3)
Unrecognized tax benefits, end of year	$ 736.8	$ 992.2	$ 990.2