Financing Arrangements - Interest Expense (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Short-Term Debt [Line Items]
Direct Interest Expense	$ 224	$ 153
Amortization of Deferred Financing Costs and Discount / Premium	8	7
Total Interest Expense	$ 232	160
Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	3.125%
4.750% Notes due 2022 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate			4.75%
Direct Interest Expense	$ 0	6
Amortization of Deferred Financing Costs and Discount / Premium	0	0
Total Interest Expense	$ 0	6
4.625% Notes due 2024 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	4.625%		4.625%
Direct Interest Expense	$ 9	9
Amortization of Deferred Financing Costs and Discount / Premium	1	1
Total Interest Expense	$ 10	10
1.650% Notes due 2024 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	1.65%		1.65%
Direct Interest Expense	$ 4	4
Amortization of Deferred Financing Costs and Discount / Premium	1	1
Total Interest Expense	$ 5	5
4.125% Notes due 2025 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	4.125%		4.125%
Direct Interest Expense	$ 10	10
Amortization of Deferred Financing Costs and Discount / Premium	1	0
Total Interest Expense	$ 11	10
4.250% Notes due 2025 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	4.25%		4.25%
Direct Interest Expense	$ 10	10
Amortization of Deferred Financing Costs and Discount / Premium	(4)	(3)
Total Interest Expense	$ 6	7
8.625% Notes due 2025 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	8.625%		8.625%
Direct Interest Expense	$ 11	11
Amortization of Deferred Financing Costs and Discount / Premium	1	1
Total Interest Expense	$ 12	12
3.400% Notes due 2026 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	3.40%		3.40%
Direct Interest Expense	$ 17	17
Amortization of Deferred Financing Costs and Discount / Premium	2	3
Total Interest Expense	$ 19	20
2.625% Notes due 2027 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	2.625%		2.625%
Direct Interest Expense	$ 5	5
Amortization of Deferred Financing Costs and Discount / Premium	1	1
Total Interest Expense	$ 6	6
3.250% Notes due 2027 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	3.25%		3.25%
Direct Interest Expense	$ 8	7
Amortization of Deferred Financing Costs and Discount / Premium	1	0
Total Interest Expense	$ 9	7
3.125% Notes due 2028 | Unsecured Notes
Short-Term Debt [Line Items]
Stated interest rate	3.125%		3.125%
Direct Interest Expense	$ 12	12
Amortization of Deferred Financing Costs and Discount / Premium	1	1
Total Interest Expense	13	13
CLO-1 Notes | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	12	5
Amortization of Deferred Financing Costs and Discount / Premium	0	0
Total Interest Expense	12	5
Revolving Credit Facility | Ambler Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	5	2
Amortization of Deferred Financing Costs and Discount / Premium	1	0
Total Interest Expense	6	2
Revolving Credit Facility | CCT Tokyo Funding Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	10	4
Amortization of Deferred Financing Costs and Discount / Premium	0	0
Total Interest Expense	10	4
Revolving Credit Facility | Darby Creek Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	15	3
Amortization of Deferred Financing Costs and Discount / Premium	0	0
Total Interest Expense	15	3
Revolving Credit Facility | Dunlap Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	10	7
Amortization of Deferred Financing Costs and Discount / Premium	0	0
Total Interest Expense	10	7
Revolving Credit Facility | Meadowbrook Run Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	10	3
Amortization of Deferred Financing Costs and Discount / Premium	0	0
Total Interest Expense	10	3
Revolving Credit Facility | Senior Secured Revolving Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	76	38
Amortization of Deferred Financing Costs and Discount / Premium	2	2
Total Interest Expense	$ 78	$ 40