Fair Value Measurements (Financial Assets And Liabilities Carried At Fair Value) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets:
Available-for-sale debt securities	$ 33.7	$ 38.3
Investment in equity securities	110.8	60.3
Cross-currency swap derivative contracts, assets	25.7
Liabilities:
Cross-currency swap derivative contracts, liabilities	111.7
Deferred compensation plans	70.4	49.8
Quoted Prices in Active Market (Level 1)
Assets:
Available-for-sale debt securities	0.0	0.0
Investment in equity securities	0.0	0.0
Cross-currency swap derivative contracts, assets	0.0
Liabilities:
Cross-currency swap derivative contracts, liabilities	0.0
Deferred compensation plans	0.0	0.0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale debt securities	33.7	38.3
Investment in equity securities	0.0	0.0
Cross-currency swap derivative contracts, assets	25.7
Liabilities:
Cross-currency swap derivative contracts, liabilities	111.7
Deferred compensation plans	70.4	49.8
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale debt securities	0.0	0.0
Investment in equity securities	0.0	0.0
Cross-currency swap derivative contracts, assets	0.0
Liabilities:
Cross-currency swap derivative contracts, liabilities	0.0
Deferred compensation plans	$ 0.0	$ 0.0