Debt - Schedule of Carrying Values and Fair Values of Debt Outstanding (Parenthetical) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Senior notes | 4.000% Senior Secured Notes due 2027
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate	4.00%	4.00%
Debt instrument maturity year	2027	2027
Senior notes | 4.375% Senior Secured Notes due 2028
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate	4.375%	4.375%
Debt instrument maturity year	2028	2028
Unsecured Debt | 7.950% Debentures due 2025
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate	7.95%	7.95%
Debt instrument maturity year	2025	2025
Unsecured Debt | 8.375% Debentures due 2027
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate	8.375%	8.375%
Debt instrument maturity year	2027	2027