Employee Benefit Plans (Summary Of Pension Obligations And Funded Status) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in benefit obligation
Benefit obligation, beginning of period		$ 219.8	$ 241.5	$ 293.0
Service cost		4.0	3.9	4.6
Interest cost		8.5	8.0	10.9
Plan participants’ contributions		0.5	0.5	0.7
Actuarial loss (gain)		36.7	(20.3)	4.0
Benefits paid		(13.8)	(13.4)	(15.2)
Plan amendments		1.9	1.9	0.0
Settlements	$ (59.8)	0.0	0.0	(59.8)
Foreign currency exchange rate changes		1.5	(2.3)	3.3
Benefit obligation, end of period	241.5	259.1	219.8	241.5
Change in plan assets
Fair value of plan assets, beginning of period		181.8	185.7	214.1
Actual return (loss) on plan assets		30.0	(10.6)	28.3
Employer contributions		1.5	21.8	14.9
Plan participants’ contributions		0.5	0.5	0.7
Benefits paid		(13.8)	(13.4)	(15.2)
Settlements		0.0	0.0	(59.8)
Foreign currency exchange rate changes		1.5	(2.2)	2.7
Fair value of plan assets, end of period	185.7	201.5	181.8	185.7
Net funded status	(55.8)	(57.6)	(38.0)	(55.8)
Funded status recognized in the Consolidated Balance Sheets
Other assets—sundry	2.2	1.4	1.6	2.2
Other current liabilities	(0.4)	(0.4)	(0.4)	(0.4)
Other long-term liabilities	$ (57.6)	$ (58.6)	$ (39.2)	$ (57.6)

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

Name:	us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.