Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2014	Dec. 31, 2019	Dec. 31, 2018
Deferred gain/loss, net of tax, included in accumulated other comprehensive income (AOCI) related to the fair value of the Company's currency derivatives designated as accounting hedges	$ (926.0)	$ (958.6)		$ (1,006.6)	$ (964.1)
Amount expected to be reclassified into interest expense over the next twelve months	0.7
Foreign Exchange Contract [Member]
Derivative, Notional Amount	500.0
Currency derivatives expected to be reclassified into earnings over the next twelve months	1.3
Interest Rate Swap [Member]
Derivative, Notional Amount	1,300.0
Designated as Hedging Instrument [Member]
Deferred (loss) remaining in AOCI related to the interest rate locks	0.0	$ 0.0
Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Deferred gain/loss, net of tax, included in accumulated other comprehensive income (AOCI) related to the fair value of the Company's currency derivatives designated as accounting hedges	2.7			$ 2.9
Senior Notes Issued in 2013 [Member] \| Interest Rate Swap [Member]
Deferred (loss) remaining in AOCI related to the interest rate locks	$ 5.8		$ 6.0