Long-Term Debt - Summary (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument
Outstanding Principal	$ 4,355.3	$ 4,397.3
Premium (Discount)	(5.7)	(5.8)
Long-Term Debt	4,349.6	4,391.5
Debt issuance costs	(29.6)	(27.8)
Long-term debt, net of unamortized issuance cost	4,320.0	4,363.7
Debt issuance cost accumulated amortization	16.9	18.4
Revolving Credit Facility Due 2027
Debt Instrument
Outstanding Principal	0.0	15.0
Premium (Discount)	0.0	0.0
Long-Term Debt	0.0	$ 15.0
Effective interest rate (as a percent)		3.90%
AR Facility due 2024
Debt Instrument
Outstanding Principal	325.0	$ 350.0
Premium (Discount)	0.0	0.0
Long-Term Debt	$ 325.0	$ 350.0
Effective interest rate (as a percent)	2.80%	1.20%
4.4% Senior Notes Due 2024
Debt Instrument
Outstanding Principal	$ 519.8	$ 521.8
Premium (Discount)	0.5	0.7
Long-Term Debt	$ 520.3	522.5
Stated interest rate (as a percent)	4.40%
4.15% Senior Notes Due 2025
Debt Instrument
Outstanding Principal	$ 720.8	720.8
Premium (Discount)	(0.3)	(0.4)
Long-Term Debt	$ 720.5	720.4
Stated interest rate (as a percent)	4.15%
4.85 Senior Notes Due 2026
Debt Instrument
Outstanding Principal	$ 491.0	491.0
Premium (Discount)	(0.3)	(0.3)
Long-Term Debt	$ 490.7	490.7
Stated interest rate (as a percent)	4.85%
5.625% Senior unsecured notes due 2028
Debt Instrument
Outstanding Principal	$ 500.0	500.0
Premium (Discount)	0.0	0.0
Long-Term Debt	$ 500.0	500.0
Stated interest rate (as a percent)	5.625%
5.375% Senior Notes Due 2029
Debt Instrument
Outstanding Principal	$ 498.7	498.7
Premium (Discount)	0.0	0.0
Long-Term Debt	$ 498.7	498.7
Stated interest rate (as a percent)	5.375%
5.6% Senior Notes Due 2044
Debt Instrument
Outstanding Principal	$ 350.0	350.0
Premium (Discount)	(0.2)	(0.2)
Long-Term Debt	$ 349.8	349.8
Stated interest rate (as a percent)	5.60%
5.05 Senior Notes Due 2045
Debt Instrument
Outstanding Principal	$ 450.0	450.0
Premium (Discount)	(5.3)	(5.5)
Long-Term Debt	$ 444.7	444.5
Stated interest rate (as a percent)	5.05%
Senior Notes, 5.45%, Due 2047
Debt Instrument
Outstanding Principal	$ 500.0	500.0
Premium (Discount)	(0.1)	(0.1)
Long-Term Debt	$ 499.9	$ 499.9
Stated interest rate (as a percent)	5.45%

Amount of long-term debt after unamortized (discount) premium and before debt issuance costs.

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Amount of accumulated amortization of debt issuance costs.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount (premium).

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

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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