v3.26.1
Carrying Value and Fair Value of Blackstone Issued Notes (Parenthetical) (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
May 31, 2026
Mar. 31, 2026
Dec. 31, 2025
Letter of Credit [Member]      
Debt Instrument [Line Items]      
Line of credit facility, maximum borrowing capacity   $ 39.3 $ 39.3
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate   0.75%  
Line of credit facility, commitment fee percentage   0.06%  
Revolving Credit Facility [Member] | Subsequent Event [Member]      
Debt Instrument [Line Items]      
Line of credit facility, average outstanding amount $ 700.0    
1.000% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   1.00%  
Debt instrument, maturity date   Oct. 05, 2026  
3.150% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   3.15%  
Debt instrument, maturity date   Oct. 02, 2027  
5.900% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   5.90%  
Debt instrument, maturity date   Nov. 03, 2027  
1.625% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   1.625%  
Debt instrument, maturity date   Aug. 05, 2028  
1.500% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   1.50%  
Debt instrument, maturity date   Apr. 10, 2029  
2.500% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   2.50%  
Debt instrument, maturity date   Jan. 10, 2030  
4.300% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   4.30%  
Debt instrument, maturity date   Nov. 03, 2030  
1.600% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   1.60%  
Debt instrument, maturity date   Mar. 30, 2031  
2.000% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   2.00%  
Debt instrument, maturity date   Jan. 30, 2032  
2.550% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   2.55%  
Debt instrument, maturity date   Mar. 30, 2032  
6.200% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   6.20%  
Debt instrument, maturity date   Apr. 22, 2033  
3.500% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   3.50%  
Debt instrument, maturity date   Jun. 01, 2034  
5.000% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   5.00%  
Debt instrument, maturity date   Dec. 06, 2034  
4.950% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   4.95%  
Debt instrument, maturity date   Feb. 15, 2036  
6.250% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   6.25%  
Debt instrument, maturity date   Aug. 15, 2042  
5.000% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   5.00%  
Debt instrument, maturity date   Jun. 15, 2044  
4.450% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   4.45%  
Debt instrument, maturity date   Jul. 15, 2045  
4.000% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   4.00%  
Debt instrument, maturity date   Oct. 02, 2047  
3.500% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   3.50%  
Debt instrument, maturity date   Sep. 10, 2049  
2.800% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   2.80%  
Debt instrument, maturity date   Sep. 30, 2050  
2.850% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   2.85%  
Debt instrument, maturity date   Aug. 05, 2051  
3.200% Notes | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate [1]   3.20%  
Debt instrument, maturity date   Jan. 30, 2052  
[1] Fair value is determined by broker quote and these notes would be classified as Level II within the fair value hierarchy.