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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Debt - Holding Company Debt (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Apr. 30, 2024	Feb. 29, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Debt	$ 6,608.0			$ 7,207.0
Revolving credit facility
Debt Instrument [Line Items]
Long-Term Line of Credit, Noncurrent	294.0
Letter of Credit [Member]
Debt Instrument [Line Items]
Long-Term Line of Credit, Noncurrent	24.0
Holding Company
Debt Instrument [Line Items]
Debt	4,847.0			4,847.0
Energy
Debt Instrument [Line Items]
Debt	1,585.0			2,185.0
Automotive Segment
Debt Instrument [Line Items]
Debt	29.0			33.0
Food Packaging Segment
Debt Instrument [Line Items]
Debt	138.0			133.0
Real Estate Segment
Debt Instrument [Line Items]
Debt	1.0			1.0
Home Fashion Segment
Debt Instrument [Line Items]
Debt	8.0			8.0
Reporting Segments
Debt Instrument [Line Items]
Debt	1,761.0			2,360.0
6.375% senior unsecured notes due 2025 \| Holding Company
Debt Instrument [Line Items]
Debt	$ 749.0			$ 749.0
Interest rate on debt instrument	6.375%			6.375%
6.250% senior unsecured notes due 2026
Debt Instrument [Line Items]
Interest rate on debt instrument		6.25%
Debt face amount		$ 12.0
6.250% senior unsecured notes due 2026 \| Holding Company
Debt Instrument [Line Items]
Debt	$ 1,238.0			$ 1,238.0
Interest rate on debt instrument	6.25%			6.25%
Debt face amount				$ 12.0
5.250% senior unsecured notes due 2027
Debt Instrument [Line Items]
Interest rate on debt instrument		5.25%		5.25%
Debt face amount		$ 5.0		$ 5.0
5.250% senior unsecured notes due 2027 \| Holding Company
Debt Instrument [Line Items]
Debt	$ 1,454.0			$ 1,454.0
Interest rate on debt instrument	5.25%			5.25%
5.25% senior unsecured notes due 2025 \| Energy
Debt Instrument [Line Items]
Interest rate on debt instrument			5.25%
Debt face amount			$ 600.0
Gain (Loss) on Extinguishment of Debt	$ (1.0)
4.375% senior unsecured notes due 2029 \| Holding Company
Debt Instrument [Line Items]
Debt	$ 708.0			$ 708.0
Interest rate on debt instrument	4.375%			4.375%
9.750% senior unsecured notes due 2029 \| Holding Company
Debt Instrument [Line Items]
Debt	$ 698.0			$ 698.0
Interest rate on debt instrument	9.75%			9.75%