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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Amount, after accumulated amortization, of debt discount.

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Debt and Credit Agreements Debt Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of New Debt Issuance [Line Items]
Loss on Extinguishment of Debt	$ 0.0	$ 0.0	$ (74.0)
Recognition of previously unrealized losses included in net income	2.6	$ 1.4	$ (4.2)
4.00% Notes Due 2022
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 250.0
Interest rate, stated percentage	4.00%
3.75% Notes Due 2023
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	3.75%
4.20% Notes Due 2024
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 250.0
Interest rate, stated percentage	4.20%
4.65% Notes Due 2028
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	4.65%
4.75% Note Due 2030
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 650.0
Interest rate, stated percentage	4.75%
5.40% Notes Due 2048
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	5.40%
2.400% Note Due 2031 (less unamortized discount and issuance costs of $0.7 and $4.3, respectively)
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	2.40%
3.375% Note Due 2041 (less unamortized discount and issuance costs of $1.1 and $5.5, respectively)
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	3.375%
Unsecured Debt 4.200% Notes Original Principal
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Unsecured Debt 5.375% Notes
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	300.0
Unsecured Debt	292.9
Debt instrument, unamortized discount	3.8
Debt Issuance Costs, Gross	$ 3.3
Interest rate, stated percentage	5.375%