Pension And Other Benefit Programs (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) Participant	Mar. 31, 2020 USD ($) Participant	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations			$ 1,431.4	$ 1,359.7	$ 1,500.1
Minimum [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-cash expense		$ 400.0
Maximum [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-cash expense		$ 350.0
U.S. Defined-Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss) amortization period			17 years	18 years	19 years
Amortization of unrecognized net actuarial gains (losses) in 2020			$ (20.5)
Estimated future employer contributions in 2020			3.9
U.S. Defined-Benefit Plans [Member] | Other Non-operating (Income) Expense, Net [Member]
Defined Benefit Plan Disclosure [Line Items]
Partial settlement losses					$ 20.8
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation			$ 2.8	$ 2.5
Defined Benefit Pension Plans [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed rate of return forecast period			10 years
Defined Benefit Pension Plans [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed rate of return forecast period			30 years
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Partial settlement losses					(20.8)
Accumulated benefit obligation			$ 1,429.5	$ 1,356.8
Long-term return forecast			5.75%	6.50%
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations			$ 77.5	$ 65.4	86.6
Average rate of annual increase in the per capita costs, pre-65			7.20%
Ultimate rate			4.50%
Amortization of unrecognized net actuarial gains (losses) in 2020			$ 5.9
Estimated future employer contributions in 2020			$ 6.5
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Average rate of annual increase in the per capita costs, post-65			8.10%
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Average rate of annual increase in the per capita costs, post-65			8.20%
U.S. and Non-U.S. Plans [Member] | Defined Contribution Benefit Plans [member]
Defined Benefit Plan Disclosure [Line Items]
Employee contributions, vested percentage			100.00%
Costs for defined contribution benefit plans			$ 7.7	$ 6.3	$ 6.2
Retirement Income Plan (RIP) [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations	$ 1,000.0
Number of retirees and beneficiaries participants | Participant	10,000	10,000
Projected benefit obligations	$ 370.0	$ 370.0
Number of deferred vested and active participants | Participant	3,000