Pension And Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	$ 1,259.8	$ 1,168.7
Percentage of non-matching contribution to participants	3.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	$ 560.7	518.5
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	1,259.8	1,168.7	$ 1,031.0
Expected cash contribution in the next fiscal year based on current actuarial calculations	20.7
Defined benefit plans contribution by the company	26.1	4.2
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	30.0	29.0	29.0
Defined benefit plans contribution by the company	2.2	2.3
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	699.1	650.2
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		0.1	0.4
Defined benefit plan, benefit obligation	3.9	3.4
Defined benefit plans contribution by the company	$ 0.2	$ 2.2	0.2
Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	44.00%	43.00%
Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	26.00%	26.00%
Alternative assets/Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	27.00%	29.00%
Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	4.00%	5.00%
Savings And Investment Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans contribution by the company	$ 11.8	$ 11.0	9.9
2% Non-Matching Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans contribution by the company	$ 14.5	$ 13.4	$ 12.5
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan employees, percentage	18.00%
Percentage of combined expected actuarial losses	1.00%	1.00%
UNITED STATES | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	7.25%	7.25%	7.75%
UNITED STATES | Equity securities [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	63.00%
UNITED STATES | Equity securities [Member] | Minimum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	35.00%
UNITED STATES | Equity securities [Member] | Maximum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	75.00%
UNITED STATES | Fixed income securities [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	16.00%
UNITED STATES | Fixed income securities [Member] | Minimum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	15.00%
UNITED STATES | Fixed income securities [Member] | Maximum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	35.00%
UNITED STATES | Alternative assets/Other [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	17.00%
UNITED STATES | Alternative assets/Other [Member] | Minimum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	10.00%
UNITED STATES | Alternative assets/Other [Member] | Maximum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	35.00%
UNITED STATES | Cash [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	4.00%
UNITED STATES | Cash [Member] | Minimum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	0.00%
UNITED STATES | Cash [Member] | Maximum [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	10.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan employees, percentage	10.00%
Percentage of combined expected actuarial gains	5.00%	1.00%
Foreign Plan [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	5.31%	5.34%	6.49%
Foreign Plan [Member] | Equity securities [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	28.00%
Foreign Plan [Member] | Fixed income securities [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	34.00%
Foreign Plan [Member] | Alternative assets/Other [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	36.00%