Debt Obligations - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Principal outstanding	$ 33,532	$ 34,707
Letters of credit outstanding, amount	59
Senior Debt Obligations
Debt Instrument [Line Items]
Principal outstanding	31,250	32,425
March 2026 $1.5 Billion 364-Day Revolving Credit Agreement, variable-rate, due March 2027 | Senior Debt Obligations
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,500
Debt instrument, term	364 days
Principal outstanding	$ 0	0
Maximum bank commitments increase	200
Total maximum borrowing capacity	1,700
March 2023 $2.7 Billion Multi-Year Revolving Credit Agreement, variable-rate, due March 2030 | Senior Debt Obligations
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	2,700
Principal outstanding	0	$ 0
Maximum bank commitments increase	500
Total maximum borrowing capacity	$ 3,200
364-Day $1.5 Billion & $2.7 Billion Revolving Credit Agreements | Senior Debt Obligations | Additional Spread Adjustment on Federal Funds Effective Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
364-Day $1.5 Billion & $2.7 Billion Revolving Credit Agreements | Senior Debt Obligations | Additional Spread Adjustment on Secured Overnight Financing Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%