Derivative Instruments - Summary of Gross Fair Values of Individual Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative, Collateral, Right to Reclaim Cash	$ 9	$ 6
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	15	27
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	22	38
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	21
Gross Amount of Collateral Received/Pledged Not Offset in the Consolidated Balance Sheet, Derivative Liabilities		38
Net Amount, Derivative Assets	15	27
Derivative Asset, Fair Value, Gross Asset	15	28
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	22	38
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liabilities Net Amount	0	0
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	14	27
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	22	38
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	21	38
Net Amount, Derivative Assets	14	27
Derivative Asset, Fair Value, Gross Asset	14	27
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	22	38
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liabilities Net Amount	0	0
Warrants [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	1	1
Derivative Asset, Fair Value, Gross Asset	1	1
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Variable Interest Entity, Primary Beneficiary [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	219	239
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	219	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	1,038	1,048
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0
Gross Amount of Collateral Received/Pledged Not Offset in the Consolidated Balance Sheet, Derivative Liabilities		0
Net Amount, Derivative Assets	0	239
Derivative Asset, Fair Value, Gross Asset	219	239
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	1,038	1,048
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liabilities Net Amount	1,038	1,048
Variable Interest Entity, Primary Beneficiary [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	177	190
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	177
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	1,038	1,048
Net Amount, Derivative Assets	0	190
Derivative Asset, Fair Value, Gross Asset	177	190
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	1,038	1,048
Derivative Liabilities Net Amount	1,038	1,048
Variable Interest Entity, Primary Beneficiary [Member] | Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	42	49
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	42	0
Net Amount, Derivative Assets	0	49
Derivative Asset, Fair Value, Gross Asset	42	$ 49
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 0