Borrowings - Narrative (Details) - USD ($)	Jun. 30, 2026	Feb. 23, 2024	Feb. 15, 2024	Feb. 24, 2023	Sep. 30, 2025	Jul. 15, 2025	Jul. 23, 2024	Nov. 14, 2023	Mar. 25, 2022
Line of Credit
Line of Credit Facility [Line Items]
Aggregate amount	$ 3,140,000,000				$ 2,735,000,000
Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 1,150,000,000				1,150,000,000
ING Credit Agreement | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Interest rate (as a percent)	1.75%
ING Credit Agreement | Base Rate
Line of Credit Facility [Line Items]
Interest rate (as a percent)	0.75%
ING Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Aggregate amount	$ 1,640,000,000				1,235,000,000
Unused capacity, commitment fee (as a percent)	0.375%
Accordion feature, increase limit									$ 1,750,000,000
Accordion feature, increase limit, percentage of shareholders' equity (as a percent)									150.00%
ING Credit Agreement | Line of Credit | External Credit Rating, Investment Grade | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Interest rate (as a percent)	1.875%
Debt instrument, basis spread, variable rate (as a percent)	0.10%
Borrowing base milestone, rate	160.00%
ING Credit Agreement | Line of Credit | External Credit Rating, Investment Grade | Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)	0.875%
ING Credit Agreement | Line of Credit | External Credit Rating, Investment Grade | Alternative Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)	0.10%
ING Credit Agreement | Letter of Credit
Line of Credit Facility [Line Items]
Aggregate amount	$ 25,000,000
JPM SPV Facility | Line of Credit
Line of Credit Facility [Line Items]
Aggregate amount	700,000,000.0			$ 700,000,000	700,000,000.0
Debt instrument, basis spread, variable rate (as a percent)				1.50%
Accordion feature, increase limit				$ 1,000,000,000.0
Tenor period (in months)				3 months
Other Borrowings | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)		1.85%		1.90%
DBNY SPV Facility | Line of Credit
Line of Credit Facility [Line Items]
Aggregate amount	400,000,000.0		$ 400,000,000		400,000,000.0
Cost of funds rate, floor (as a percent)			0.25%
Borrowing capacity, increase limit			$ 1,000,000,000.0
DBNY SPV Facility | Line of Credit | Cost of Funds Rate | Interest Rate Scenario One
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)			1.60%
DBNY SPV Facility | Line of Credit | Cost of Funds Rate | Interest Rate Scenario Two
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)			2.25%
DBNY SPV Facility | Line of Credit | Cost of Funds Rate | Interest Rate Scenario Three
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)			2.00%
MS SPV Facility | Line of Credit
Line of Credit Facility [Line Items]
Aggregate amount	$ 400,000,000.0	$ 400,000,000			$ 400,000,000.0
Debt instrument, basis spread, variable rate (as a percent)		1.60%
Accordion feature, increase limit		$ 600,000,000
MS SPV Facility | Line of Credit | Interest Rate Scenario One
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)		1.80%
MS SPV Facility | Line of Credit | Interest Rate Scenario Two
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)		0.50%
MS SPV Facility | Line of Credit | Interest Rate Scenario Three
Line of Credit Facility [Line Items]
Debt instrument, basis spread, variable rate (as a percent)		2.00%
Notes due 2028 | Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount								$ 350,000,000
Debt interest rate (as a percent)								8.40%
Derivative interest rate (as a percent)								8.40%
Floating interest rate (as a percent)								4.0405%
Notional Amount								$ 350,000,000
Notes Due 2029 | Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount							$ 400,000,000
Debt interest rate (as a percent)							6.50%
Derivative interest rate (as a percent)							6.50%
Floating interest rate (as a percent)							2.5954%
Notional Amount							$ 400,000,000
Notes Due 2030 | Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount						$ 400,000,000
Debt interest rate (as a percent)						6.19%	6.19%
Derivative interest rate (as a percent)						6.19%
Floating interest rate (as a percent)						2.4926%
Notional Amount						$ 400,000,000