Fair Value Measurements (Assets And Liabilities Measured On A Recurring Basis) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Document Period End Date		Mar. 31, 2020
Assets, Fair Value Disclosure [Abstract]
Derivative financial instrument assets		$ 88.1	$ 28.9
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instrument liabilities		234.6	81.5
Liabilities held for sale		9.3	9.3
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Equity securities	[1]	35.9	54.8
Held-to-maturity debt securities		71.9	71.9
Assets held for sale		11.2	25.8
Assets, Fair Value Disclosure		559.8	297.5
Liabilities, Fair Value Disclosure [Abstract]
Liabilities held for sale		9.3	9.3
Total liabilities		893.2	472.1
Fair Value, Measurements, Recurring | Long-term - Derivative financial instruments - Synthetic Bonds - Call Option Premium
Assets, Fair Value Disclosure [Abstract]
Derivative financial instrument assets		0.3	4.3
Fair Value, Measurements, Recurring | Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Derivative financial instrument assets		437.0	137.1
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instrument liabilities		583.5	189.7
Fair Value, Measurements, Recurring | Long-term - Derivative financial instruments - Synthetic Bonds - Embedded Derivatives
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instrument liabilities		0.3	4.3
Fair Value, Measurements, Recurring | Level 1
Assets, Fair Value Disclosure [Abstract]
Equity securities	[1]	35.9	54.8
Assets, Fair Value Disclosure		35.9	54.8
Fair Value, Measurements, Recurring | Level 1 | Long-term - Derivative financial instruments - Synthetic Bonds - Embedded Derivatives
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instrument liabilities		0.0
Fair Value, Measurements, Recurring | Level 2
Assets, Fair Value Disclosure [Abstract]
Equity securities	[1]		0.0
Held-to-maturity debt securities		71.9	71.9
Assets, Fair Value Disclosure		510.9	214.8
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities		583.8	194.0
Fair Value, Measurements, Recurring | Level 2 | Long-term - Derivative financial instruments - Synthetic Bonds - Call Option Premium
Assets, Fair Value Disclosure [Abstract]
Derivative financial instrument assets		0.3	4.3
Fair Value, Measurements, Recurring | Level 2 | Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Derivative financial instrument assets		437.0	137.1
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instrument liabilities		583.5	189.7
Fair Value, Measurements, Recurring | Level 2 | Long-term - Derivative financial instruments - Synthetic Bonds - Embedded Derivatives
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instrument liabilities		0.3	4.3
Fair Value, Measurements, Recurring | Level 3
Assets, Fair Value Disclosure [Abstract]
Assets held for sale		11.2	25.8
Assets, Fair Value Disclosure		11.2	25.8
Liabilities, Fair Value Disclosure [Abstract]
Liabilities held for sale		9.3	9.3
Total liabilities		309.4	278.1
Redeemable financial liability | Fair Value, Measurements, Recurring
Liabilities, Fair Value Disclosure [Abstract]
Redeemable financial liability		300.1	268.8
Redeemable financial liability | Fair Value, Measurements, Recurring | Level 3
Liabilities, Fair Value Disclosure [Abstract]
Redeemable financial liability		300.1	268.8
Nonqualified Plan [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Money market fund		1.7	1.5
Stable Value Fund	[2]	1.8	2.1
Nonqualified Plan [Member] | Fair Value, Measurements, Recurring | Level 2
Assets, Fair Value Disclosure [Abstract]
Money market fund		$ 1.7	$ 1.5

[1] Includes fixed income and other investments measured at fair value.

[2] Certain investments that are measured at fair value using net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.