Outstanding Debentures with Put Option that can be exercised at the holders option

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Contractual interest rate for funds borrowed, under the debt agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Debt and Credit Facilities (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Feb. 29, 2020	Dec. 31, 2019	Mar. 31, 2019
Proceeds from long-term debt	$ 0.0	$ 1,497.9
Long-term debt excluding current maturities	4,494.2			$ 4,922.9
Short-term borrowings and current maturities of long-term debt	775.1			650.3
Repayments of Long-term Debt	307.5	7.5
Debt Instrument, Fair Value Disclosure	6,200.0			6,200.0
Commercial Paper [Member]
Short-term borrowings and current maturities of long-term debt		$ 0.0		0.0
Debentures With Put Feature [Member]
Short-term borrowings and current maturities of long-term debt	343.0			343.0
Debentures with put option available to be exercised			$ 37.2
Three Point Five Percent Senior notes Due Two Thousand Twenty Six [Member]
Long-term debt excluding current maturities	$ 397.2			$ 396.8	$ 400.0
Debt Instrument, Interest Rate, Stated Percentage	3.50%			3.50%
Three Point Eight Percent Senior Notes Due Two Thousand Twenty Nine [Member]
Long-term debt excluding current maturities	$ 744.1			$ 743.6	750.0
Debt Instrument, Interest Rate, Stated Percentage	3.80%			3.80%
Four Point Five Percent Senior Notes Due Two Thousand Forty Nine [Member]
Long-term debt excluding current maturities	$ 345.6			$ 345.5	350.0
Debt Instrument, Interest Rate, Stated Percentage	4.50%			4.50%
4.25% Senior notes due 2023 [Member]
Long-term debt excluding current maturities	$ 698.3			$ 697.8
Debt Instrument, Interest Rate, Stated Percentage	4.25%			4.25%
5.75% Senior notes due 2043 [Member]
Long-term debt excluding current maturities	$ 494.7			$ 494.5
Debt Instrument, Interest Rate, Stated Percentage	5.75%			5.75%
Three Point Five Five Percent Senior Notes due 2024 [Member]
Long-term debt excluding current maturities	$ 497.1			$ 496.6
Debt Instrument, Interest Rate, Stated Percentage	3.55%			3.55%
Four Point Six Five Percent Senior Notes due Twenty Forty Four [Member]
Long-term debt excluding current maturities	$ 296.0			$ 295.9
Debt Instrument, Interest Rate, Stated Percentage	4.65%			4.65%
Senior Notes [Member]
Long-term debt excluding current maturities					$ 1,500.0
Commercial Paper [Member]
Line of credit facility, amount outstanding	$ 2,000.0
Revolving Credit Facility [Member]
Line of credit facility, amount outstanding	1,000.0
Line of Credit Facility, Remaining Borrowing Capacity	$ 2,000.0			$ 2,000.0