Pension Benefit Plans (Funded Status Of Pension Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Change in plan assets:
Fair value of plan assets at beginning of year	$ 2,911.1
Fair value of plan assets at end of year	3,204.2	$ 2,911.1
Pension Benefit Plans | Foreign Plan
Change in benefit obligation:
Benefit obligation at beginning of year	1,493.0	1,449.3
Service cost	32.7	36.4
Interest cost	25.5	32.8
Employee contributions	8.2	8.6
Benefits and other expenses paid	(58.3)	(48.4)
Acquisitions and other	0.0	0.0
Actuarial loss (gain)	(51.4)	174.1
Amendments, settlements and curtailments	(10.5)	(25.9)
Foreign exchange rate impact	132.6	(133.9)
Benefit obligation at end of year	1,571.8	1,493.0
Change in plan assets:
Fair value of plan assets at beginning of year	1,042.9	1,025.9
Actual return on plan assets	74.6	134.3
Employer contributions	44.7	43.5
Employee contributions	8.2	8.6
Amendments and settlements	(3.7)	(7.3)
Benefits and other expenses paid	(58.3)	(48.4)
Foreign exchange rate impact	90.9	(113.7)
Fair value of plan assets at end of year	1,199.3	1,042.9
Funded status	(372.5)	(450.1)
United States | Pension Benefit Plans | Domestic Plan
Change in benefit obligation:
Benefit obligation at beginning of year	2,558.1	2,603.9
Service cost	7.3	9.0
Interest cost	82.3	89.7
Employee contributions	0.0	0.0
Benefits and other expenses paid	(181.8)	(204.8)
Acquisitions and other	0.0	(7.4)
Actuarial loss (gain)	139.9	67.7
Amendments, settlements and curtailments	7.1	0.0
Foreign exchange rate impact	0.0	0.0
Benefit obligation at end of year	2,612.9	2,558.1
Change in plan assets:
Fair value of plan assets at beginning of year	1,868.2	1,892.6
Actual return on plan assets	265.3	122.7
Employer contributions	53.2	57.7
Employee contributions	0.0	0.0
Amendments and settlements	0.0	0.0
Benefits and other expenses paid	(181.8)	(204.8)
Foreign exchange rate impact	0.0	0.0
Fair value of plan assets at end of year	2,004.9	1,868.2
Funded status	$ (608.0)	$ (689.9)