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

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Fair Value of Assets and Liabilities - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2021	Feb. 24, 2021	Dec. 31, 2020
5.875% Senior Notes due 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Stated interest rate	5.875%		5.875%
5.875% Senior Notes due 2024
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Stated interest rate	5.875%		5.875%
6.00% Senior Notes due 2026
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Stated interest rate	6.00%		6.00%
5.125% Senior Notes due 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Stated interest rate	5.125%		5.125%
6.50% Exchangeable Senior Notes due 2026
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Stated interest rate	6.50%
Debt instrument, face amount		$ 230