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Debt (Redemption Periods Senior Unsecured Notes) (Details) - Senior Unsecured Notes
12 Months Ended
Dec. 31, 2021
Debt Instrument [Line Items]  
Redemption of up to 35% of the principal amount of notes with the proceeds of an equity offering permitted prior to 35.00%
2024 Notes  
Debt Instrument [Line Items]  
Redemption of up to 35% of the principal amount of notes with the proceeds of an equity offering permitted prior to 35.00%
2025 Notes  
Debt Instrument [Line Items]  
Redemption of up to 35% of the principal amount of notes with the proceeds of an equity offering permitted prior to 35.00%
2026 Notes  
Debt Instrument [Line Items]  
Redemption of up to 35% of the principal amount of notes with the proceeds of an equity offering permitted prior to 35.00%
2027 Notes  
Debt Instrument [Line Items]  
Redemption of up to 35% of the principal amount of notes with the proceeds of an equity offering permitted prior to 35.00%
2028 Notes  
Debt Instrument [Line Items]  
Redemption of up to 35% of the principal amount of notes with the proceeds of an equity offering permitted prior to 35.00%