Fair Value - Schedule of Fixed-Rate Senior Notes, Fair Value (Details) - Senior Notes - Fair Value, Inputs, Level 2	Sep. 30, 2024 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed rate senior notes carrying amount	$ 7,500,000,000
Senior Notes Due 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 300,000,000
Interest rate	3.85%
Fair value	$ 299,000,000
Senior Unsecured Notes Due September 15, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 700,000,000
Interest rate	1.00%
Fair value	$ 678,000,000
Senior Notes Due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 700,000,000
Interest rate	3.80%
Fair value	$ 696,000,000
Senior Unsecured Notes Due September 15, 2027
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 700,000,000
Interest rate	1.40%
Fair value	$ 648,000,000
Senior Notes Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 800,000,000
Interest rate	4.20%
Fair value	$ 800,000,000
Senior Notes Due in October 2029
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 500,000,000
Interest rate	4.50%
Fair value	$ 504,000,000
Senior Notes Due in 2029
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 700,000,000
Interest rate	2.95%
Fair value	$ 658,000,000
Senior Notes Due June 2030
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 600,000,000
Interest rate	2.00%
Fair value	$ 528,000,000
Senior Unsecured Notes Due February 15, 2031
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 1,000,000,000
Interest rate	1.75%
Fair value	$ 846,000,000
Senior Notes Due 2032
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 500,000,000
Interest rate	4.75%
Fair value	$ 502,000,000
Senior Notes Due 2034
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 1,000,000,000
Interest rate	4.90%
Fair value	$ 1,008,000,000