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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Weighted average interest rate of debt outstanding.

+ References

No definition available.

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Fair value of the amount outstanding under the credit facility.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Debt - Schedule of Debt Instruments (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
	May 15, 2020	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total short-term debt		$ 80.0	$ 195.0
Long-term debt, net		2,618.4	2,222.1
Total debt, net		$ 2,698.4	$ 2,417.1
Weighted average cost of debt		4.50%	4.50%
Secured debt \| Term loan, due 2026
Debt Instrument [Line Items]
Senior unsecured notes, due date		Nov. 18, 2026	Nov. 18, 2026
Senior unsecured notes \| 5.625% senior unsecured notes, due 2024
Debt Instrument [Line Items]
Stated interest rate		5.625%	5.625%
Senior unsecured notes, due date		Feb. 15, 2024	Feb. 15, 2024
Senior unsecured notes \| 6.250% senior unsecured notes, due 2025
Debt Instrument [Line Items]
Stated interest rate	6.25%	6.25%
Senior unsecured notes, due date	Jun. 15, 2025	Jun. 15, 2025
Senior unsecured notes \| 5.000% senior unsecured notes, due 2027
Debt Instrument [Line Items]
Stated interest rate		5.00%	5.00%
Senior unsecured notes, due date		Aug. 15, 2027	Aug. 15, 2027
Senior unsecured notes \| 4.625% senior unsecured notes, due 2030
Debt Instrument [Line Items]
Stated interest rate		4.625%	4.625%
Senior unsecured notes, due date		Mar. 15, 2030	Mar. 15, 2030
Short-term debt \| AR Facility
Debt Instrument [Line Items]
Credit facility, outstanding amount		$ 0.0	$ 105.0
Short-term debt \| Repurchase facility
Debt Instrument [Line Items]
Credit facility, outstanding amount		80.0	90.0
Long-term debt
Debt Instrument [Line Items]
Debt issuance costs		(30.8)	(27.1)
Long-term debt \| Secured debt \| Term loan, due 2026
Debt Instrument [Line Items]
Long-term debt, net		597.7	597.5
Long-term debt \| Senior unsecured notes
Debt Instrument [Line Items]
Long-term debt, net		2,051.5	1,651.7
Long-term debt \| Senior unsecured notes \| 5.625% senior unsecured notes, due 2024
Debt Instrument [Line Items]
Long-term debt, net		501.5	501.7
Long-term debt \| Senior unsecured notes \| 6.250% senior unsecured notes, due 2025
Debt Instrument [Line Items]
Long-term debt, net	$ 400.0	400.0	0.0
Long-term debt \| Senior unsecured notes \| 5.000% senior unsecured notes, due 2027
Debt Instrument [Line Items]
Long-term debt, net		650.0	650.0
Long-term debt \| Senior unsecured notes \| 4.625% senior unsecured notes, due 2030
Debt Instrument [Line Items]
Long-term debt, net		$ 500.0	$ 500.0