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Financing Arrangements - Outstanding Financing Arrangements (Details) € in Millions, £ in Millions, $ in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2025 EUR (€)	Dec. 31, 2025 GBP (£)	Dec. 31, 2025 AUD ($)	Sep. 25, 2025	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 GBP (£)	Dec. 31, 2024 AUD ($)	Dec. 31, 2024 CAD ($)	Dec. 27, 2024	Nov. 20, 2024	Jun. 06, 2024	Dec. 31, 2023 USD ($)	Nov. 21, 2023	Dec. 31, 2022 USD ($)	Jan. 18, 2022	Dec. 31, 2021 USD ($)	Oct. 12, 2021	Jun. 17, 2021	Jun. 16, 2021	Dec. 10, 2020	Apr. 30, 2020	Nov. 20, 2019	Dec. 02, 2015
Debt Instrument [Line Items]
Senior securities issued		$ 7,620,000,000	$ 7,385,000,000												$ 8,223,000,000		$ 8,731,000,000		$ 9,179,000,000
Amount Available		3,268,000,000	4,363,000,000
Derivatives before offset		0	$ 3,000,000
Interest Rate Swap
Debt Instrument [Line Items]
Derivatives before offset		$ 59,000,000
Callowhill Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.75%
Senior securities issued		$ 284,000,000
Amount Available		116,000,000
Ambler Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)			2.25%
Senior securities issued			$ 133,000,000
Amount Available			$ 67,000,000
Floor on benchmark rate (as percent)			0.00%
CCT Tokyo Funding Credit Facility | Line of Credit
Debt Instrument [Line Items]
Stated interest rate (as percent)																										0.50%
CCT Tokyo Funding Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Senior securities issued		45,000,000	$ 147,000,000
Amount Available		$ 0	$ 0
Floor on benchmark rate (as percent)		0.00%	0.00%
CCT Tokyo Funding Credit Facility | Line of Credit | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.90%	1.90%
CCT Tokyo Funding Credit Facility | Line of Credit | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		2.05%	2.05%
Darby Creek Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)			2.65%
Senior securities issued			$ 500,000,000
Amount Available			$ 250,000,000
Floor on benchmark rate (as percent)			0.00%
Meadowbrook Run Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.95%	2.70%
Senior securities issued		$ 265,000,000	$ 200,000,000
Amount Available		$ 35,000,000	$ 100,000,000
Floor on benchmark rate (as percent)		0.00%	0.00%
Senior Secured Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Senior securities issued								€ 455	£ 165	$ 4	$ 3
Senior Secured Revolving Credit Facility | Revolving Credit Facility | United States of America, Dollars
Debt Instrument [Line Items]
Exchange rate			1.04					1.04	1.04	1.04	1.04
Senior Secured Revolving Credit Facility | Revolving Credit Facility | United Kingdom, Pounds
Debt Instrument [Line Items]
Basis spread on variable rate, credit spread adjustment (as percent)		0.0326%	0.0326%
Exchange rate			1.25					1.25	1.25	1.25	1.25
Senior Secured Revolving Credit Facility | Revolving Credit Facility | Euro Member Countries, Euro
Debt Instrument [Line Items]
Exchange rate			1.00					1.00	1.00	1.00	1.00
Senior Secured Revolving Credit Facility | Revolving Credit Facility | Canada, Dollars
Debt Instrument [Line Items]
Exchange rate			0.69					0.69	0.69	0.69	0.69
Senior Secured Revolving Credit Facility | Revolving Credit Facility | Australia, Dollars
Debt Instrument [Line Items]
Exchange rate			0.62					0.62	0.62	0.62	0.62
Senior Secured Revolving Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Senior securities issued		$ 1,533,000,000	$ 628,000,000	€ 361	£ 180	$ 3
Amount Available		$ 3,117,000,000	$ 3,946,000,000
Floor on benchmark rate (as percent)		0.00%	0.00%
Senior Secured Revolving Credit Facility | Line of Credit | Revolving Credit Facility | United States of America, Dollars
Debt Instrument [Line Items]
Basis spread on variable rate, credit spread adjustment (as percent)		0.10%	0.10%
Senior Secured Revolving Credit Facility | Line of Credit | Revolving Credit Facility | United Kingdom, Pounds
Debt Instrument [Line Items]
Exchange rate		1.34		1.34	1.34	1.34
Senior Secured Revolving Credit Facility | Line of Credit | Revolving Credit Facility | Euro Member Countries, Euro
Debt Instrument [Line Items]
Exchange rate		1.17		1.17	1.17	1.17
Senior Secured Revolving Credit Facility | Line of Credit | Revolving Credit Facility | Australia, Dollars
Debt Instrument [Line Items]
Exchange rate		0.67		0.67	0.67	0.67
Senior Secured Revolving Credit Facility | Line of Credit | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.75%	1.75%
Senior Secured Revolving Credit Facility | Line of Credit | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.88%	1.88%
Senior Secured Revolving Credit Facility | Line of Credit | Standby Letters of Credit
Debt Instrument [Line Items]
Long-term line of credit		$ 50,000,000	$ 21,000,000
1.650% Notes due 2024 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		1.65%	1.65%	1.65%	1.65%	1.65%		1.65%	1.65%	1.65%	1.65%				1.65%
4.125% Notes due 2025 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		4.125%	4.125%	4.125%	4.125%	4.125%		4.125%	4.125%	4.125%	4.125%				4.125%										4.125%
Senior securities issued			$ 470,000,000
Fair value			$ 469,000,000
4.250% Unsecured Notes due 2025 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)			4.25%					4.25%	4.25%	4.25%	4.25%						4.25%					4.25%
Senior securities issued			$ 475,000,000
Fair value			$ 474,000,000
8.625% Notes due 2025 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		8.625%	8.625%	8.625%	8.625%	8.625%		8.625%	8.625%	8.625%	8.625%				8.625%									8.625%
Senior securities issued			$ 250,000,000
Fair value			$ 251,000,000
3.400% Notes due 2026 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		3.40%	3.40%	3.40%	3.40%	3.40%		3.40%	3.40%	3.40%	3.40%				3.40%								3.40%
Senior securities issued		$ 1,000,000,000	$ 1,000,000,000
Fair value		$ 1,000,000,000	$ 981,000,000
2.625% Notes due 2027 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		2.625%	2.625%	2.625%	2.625%	2.625%		2.625%	2.625%	2.625%	2.625%				2.625%						2.625%
Senior securities issued		$ 400,000,000	$ 400,000,000
Fair value		$ 389,000,000	$ 379,000,000
3.250% Notes due 2027 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		3.25%	3.25%	3.25%	3.25%	3.25%		3.25%	3.25%	3.25%	3.25%				3.25%			3.25%
Senior securities issued		$ 500,000,000	$ 500,000,000
Fair value		$ 483,000,000	$ 474,000,000
3.125% Notes due 2028 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		3.125%	3.125%	3.125%	3.125%	3.125%		3.125%	3.125%	3.125%	3.125%				3.125%					3.125%
Senior securities issued		$ 750,000,000	$ 750,000,000
Fair value		$ 692,000,000	$ 680,000,000
7.875% Notes due 2029 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		7.875%	7.875%	7.875%	7.875%	7.875%		7.875%	7.875%	7.875%	7.875%				7.875%	7.875%
Senior securities issued		$ 400,000,000	$ 400,000,000
Fair value		$ 414,000,000	$ 426,000,000
6.875% Notes due 2029 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		6.875%	6.875%	6.875%	6.875%	6.875%		6.875%	6.875%	6.875%	6.875%			6.875%	6.875%
Senior securities issued		$ 600,000,000	$ 600,000,000
Fair value		$ 624,000,000	615,000,000
6.875% Notes due 2029 | Unsecured Notes | Interest Rate Swap
Debt Instrument [Line Items]
Stated interest rate (as percent)		6.875%		6.875%	6.875%	6.875%								6.875%
Derivatives before offset		$ 24,000,000	$ 15,000,000
6.125% Notes due 2030 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		6.125%	6.125%	6.125%	6.125%	6.125%		6.125%	6.125%	6.125%	6.125%	6.125%	6.125%
Senior securities issued		$ 700,000,000	$ 700,000,000
Fair value		$ 732,000,000	700,000,000
6.125% Notes due 2030 | Unsecured Notes | Interest Rate Swap
Debt Instrument [Line Items]
Stated interest rate (as percent)		6.125%		6.125%	6.125%	6.125%						6.125%	6.125%	6.125%
Derivatives before offset		$ 32,000,000	$ 0
6.125% Notes due 2031 | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		6.125%	6.125%	6.125%	6.125%	6.125%	6.125%	6.125%	6.125%	6.125%	6.125%			6.125%	6.125%
Senior securities issued		$ 400,000,000
Fair value		$ 403,000,000
6.125% Notes due 2031 | Unsecured Notes | Interest Rate Swap
Debt Instrument [Line Items]
Stated interest rate (as percent)		6.125%		6.125%	6.125%	6.125%								6.125%
Derivatives before offset		$ 3,000,000
CLO-1 Notes | Collateralized Loan Obligations
Debt Instrument [Line Items]
Senior securities issued		$ 380,000,000	$ 232,000,000
Floor on benchmark rate (as percent)		0.00%	0.00%
CLO-1 Notes | Collateralized Loan Obligations | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	3.01%	1.48%
CLO-1 Notes | Collateralized Loan Obligations | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	1.85%	2.15%
CLO-2 Notes | Collateralized Loan Obligations
Debt Instrument [Line Items]
Senior securities issued		$ 363,000,000
CLO-2 Notes | Collateralized Loan Obligations | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.47%
CLO-2 Notes | Collateralized Loan Obligations | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		2.10%
1.90% Term Loan Outstanding
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.90%	1.90%
Term loan outstanding		$ 30,000,000	$ 98,000,000
2.05% Commitments Outstanding
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		2.05%	2.05%
2.05% Commitments Outstanding | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving commitment outstanding		$ 15,000,000	$ 49,000,000
1.48% Class A-1 Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.48%
Senior securities issued		$ 160,000,000.0
1.48% Class A-1L Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.48%
Senior securities issued		$ 100,000,000.0
1.48% Class A-1W Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.48%
Senior securities issued		$ 30,000,000.0
1.60% Class A-2L Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.60%
Senior securities issued		$ 20,000,000.0
Class B Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.75%
Senior securities issued		$ 30,000,000.0
Class C Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate (as percent)		2.15%		2.15%	2.15%	2.15%
Senior securities issued		$ 40,000,000.0
1.47 % Class A-1 Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.47%
Senior securities issued		$ 125,500,000
1.65% Class A-2 Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.65%
Senior securities issued		$ 19,000,000.0
1.80% Class B Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.80%
Senior securities issued		$ 35,600,000
2.10% Class A-C Notes Outstanding | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		2.10%
Senior securities issued		$ 33,200,000
1.85% Class A-1R Notes Outstanding | Collateralized Loan Obligations
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)			1.85%
Senior securities issued			$ 161,800,000
2.25% Class A-2R Notes Outstanding | Collateralized Loan Obligations
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)			2.25%
Senior securities issued			$ 20,500,000
2.60% Class B-1R Notes Outstanding | Collateralized Loan Obligations
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)			2.60%
Senior securities issued			$ 32,400,000
3.011% Class B-2R Notes Outstanding | Collateralized Loan Obligations
Debt Instrument [Line Items]
Stated interest rate (as percent)			3.011%					3.011%	3.011%	3.011%	3.011%
Senior securities issued			$ 17,400,000
1.47% Class A-1 Senior Floating Rate Loans | Unsecured Notes
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)		1.47%
Senior securities issued		$ 150,000,000.0

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