v3.25.0.1
Debt (Carrying Value of Debt) (Details) - USD ($)
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Oct. 31, 2023
Mar. 31, 2023
Aug. 31, 2022
May 31, 2022
Jan. 31, 2022
Debt Instrument [Line Items]                
Finance leases and other $ 315,000,000   $ 251,000,000          
Long-term debt, gross and lease obligation 12,840,000,000   12,949,000,000          
Adjustments (127,000,000)   (130,000,000)          
Total long term debt maturities 12,840,000,000              
Total Debt 12,713,000,000   12,819,000,000          
Less: current portion (862,000,000)   (932,000,000)          
Long-term portion 11,851,000,000   11,887,000,000          
Uncommitted Credit Facility                
Debt Instrument [Line Items]                
Credit facility maximum borrowing capacity               $ 200,000,000
Principal 0   0          
Adjustments 0   0          
Total long term debt maturities 0   0          
The Credit Facility                
Debt Instrument [Line Items]                
Principal 514,000,000   297,000,000          
Adjustments 0   0          
Total long term debt maturities 514,000,000   297,000,000          
Term Loan Facility                
Debt Instrument [Line Items]                
Principal 0   500,000,000          
Adjustments 0   0          
Total long term debt maturities 0   500,000,000          
Commercial Paper Facility                
Debt Instrument [Line Items]                
Credit facility maximum borrowing capacity       $ 1,500,000,000   $ 1,000,000,000.0 $ 500,000,000  
Principal 477,000,000   496,000,000          
Adjustments 0   (1,000,000)          
Total long term debt maturities $ 477,000,000   495,000,000          
Senior notes: August 2024                
Debt Instrument [Line Items]                
Interest Rate 2.50%              
Principal $ 0   900,000,000          
Adjustments 0   (1,000,000)          
Total long term debt maturities $ 0   899,000,000          
Senior notes: March 2025                
Debt Instrument [Line Items]                
Interest Rate 3.20%              
Principal $ 500,000,000   500,000,000          
Adjustments 0   (1,000,000)          
Total long term debt maturities $ 500,000,000   499,000,000          
Senior notes: November 2025                
Debt Instrument [Line Items]                
Interest Rate 0.875%              
Principal $ 350,000,000   350,000,000          
Adjustments 0   (1,000,000)          
Total long term debt maturities $ 350,000,000   349,000,000          
Senior notes: July 2026                
Debt Instrument [Line Items]                
Interest Rate 2.90%              
Principal $ 500,000,000   500,000,000          
Adjustments (1,000,000)   (2,000,000)          
Total long term debt maturities $ 499,000,000   498,000,000          
Senior notes: November 2027                
Debt Instrument [Line Items]                
Interest Rate 3.375%              
Principal $ 650,000,000   650,000,000          
Adjustments (2,000,000)   (3,000,000)          
Total long term debt maturities $ 648,000,000   647,000,000          
Senior notes: May 2028                
Debt Instrument [Line Items]                
Interest Rate 3.95%              
Principal $ 800,000,000   800,000,000          
Adjustments (7,000,000)   (9,000,000)          
Total long term debt maturities $ 793,000,000   $ 791,000,000          
Senior notes: April 2029                
Debt Instrument [Line Items]                
Interest Rate 4.875%   4.875%          
Principal $ 750,000,000   $ 750,000,000          
Adjustments (6,000,000)   (7,000,000)          
Total long term debt maturities $ 744,000,000   743,000,000          
Senior notes: November 2029                
Debt Instrument [Line Items]                
Interest Rate 5.00%              
Principal $ 400,000,000 $ 400,000,000 0          
Adjustments (4,000,000)   0          
Total long term debt maturities $ 396,000,000   0          
Senior notes: March 2030                
Debt Instrument [Line Items]                
Interest Rate 2.30%              
Principal $ 600,000,000   600,000,000          
Adjustments (4,000,000)   (4,000,000)          
Total long term debt maturities $ 596,000,000   596,000,000          
Senior notes: February 2031                
Debt Instrument [Line Items]                
Interest Rate 1.45%              
Principal $ 650,000,000   650,000,000          
Adjustments (5,000,000)   (6,000,000)          
Total long term debt maturities $ 645,000,000   644,000,000          
Senior notes: February 2032                
Debt Instrument [Line Items]                
Interest Rate 1.75%              
Principal $ 750,000,000   750,000,000          
Adjustments (5,000,000)   (5,000,000)          
Total long term debt maturities $ 745,000,000   745,000,000          
Senior notes: March 2033                
Debt Instrument [Line Items]                
Interest Rate 2.375%              
Principal $ 700,000,000   700,000,000          
Adjustments (6,000,000)   (6,000,000)          
Total long term debt maturities $ 694,000,000   694,000,000          
Senior notes: December 2033                
Debt Instrument [Line Items]                
Interest Rate 5.00%              
Principal $ 650,000,000   650,000,000          
Adjustments (9,000,000)   (9,000,000)          
Total long term debt maturities $ 641,000,000   641,000,000          
Senior notes: April 2034                
Debt Instrument [Line Items]                
Interest Rate 5.00%              
Principal $ 800,000,000   800,000,000   $ 800,000,000      
Adjustments (10,000,000)   (11,000,000)          
Total long term debt maturities $ 790,000,000   789,000,000          
Senior notes: November 2034                
Debt Instrument [Line Items]                
Interest Rate 5.20%              
Principal $ 500,000,000 $ 500,000,000 0          
Adjustments (6,000,000)   0          
Total long term debt maturities $ 494,000,000   0          
Senior notes: March 2035                
Debt Instrument [Line Items]                
Interest Rate 6.086%              
Principal $ 182,000,000   182,000,000          
Adjustments (11,000,000)   (12,000,000)          
Total long term debt maturities $ 171,000,000   170,000,000          
Senior notes: March 2040                
Debt Instrument [Line Items]                
Interest Rate 6.20%              
Principal $ 400,000,000   400,000,000          
Adjustments (3,000,000)   (3,000,000)          
Total long term debt maturities $ 397,000,000   397,000,000          
Senior notes: May 2041                
Debt Instrument [Line Items]                
Interest Rate 5.70%              
Principal $ 386,000,000   386,000,000          
Adjustments (5,000,000)   (5,000,000)          
Total long term debt maturities $ 381,000,000   381,000,000          
Senior notes: March 2050                
Debt Instrument [Line Items]                
Interest Rate 3.05%              
Principal $ 400,000,000   400,000,000          
Adjustments (7,000,000)   (7,000,000)          
Total long term debt maturities $ 393,000,000   393,000,000          
Debentures: September 2035                
Debt Instrument [Line Items]                
Interest Rate 7.40%              
Principal $ 148,000,000   148,000,000          
Adjustments (27,000,000)   (29,000,000)          
Total long term debt maturities 121,000,000   119,000,000          
Tax-exempt                
Debt Instrument [Line Items]                
Principal 1,418,000,000   1,289,000,000          
Adjustments (9,000,000)   (8,000,000)          
Total long term debt maturities $ 1,409,000,000   $ 1,281,000,000          
Tax-exempt | Minimum                
Debt Instrument [Line Items]                
Interest Rate 3.375%              
Tax-exempt | Maximum                
Debt Instrument [Line Items]                
Interest Rate 4.375%              
Finance leases and other | Minimum                
Debt Instrument [Line Items]                
Interest Rate 1.726%              
Finance leases and other | Maximum                
Debt Instrument [Line Items]                
Interest Rate 9.75%