Income Taxes (Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Allowance for doubtful accounts	$ 19.1	$ 19.7
Inventories	73.3	81.2
Pension and postretirement benefits	231.3	222.7
Environmental and regulatory compliance	22.1	22.4
Other accruals and prepayments	194.6	223.7
Stock-based compensation expense	68.5	64.7
Operating lease liabilities	193.7	0.0
Tax credit and loss carryforwards	703.4	894.5
Valuation allowances	(261.2)	(389.6)
Total deferred tax asset	1,244.8	1,139.3
Deferred tax liabilities:
Property, plant and equipment	(113.5)	(90.0)
Insurance, including self-insurance	(272.3)	(564.0)
Basis difference in LYONs	(13.8)	(21.6)
Operating lease ROU assets	(185.7)	0.0
Goodwill and other intangibles	(2,311.7)	(2,774.9)
Total deferred tax liability	(2,897.0)	(3,450.5)
Net deferred tax liability	$ (1,652.2)	$ (2,311.2)