v3.26.1
Schedule H; Line 4i - Schedule of Assets (Held at End of Year) (Details) - Retirement Savings Plan
12 Months Ended
Dec. 31, 2025
USD ($)
shares
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity tax identification number 74-1563240
Plan number 004
Fair value to contract value adjustment $ 32,067,447
Notes Receivable from Participants 209,714,984
Total assets held for investment 18,807,267,812
Investments, At Fair Value  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 17,539,922,974
Investment, Fair Value, Held At Contract Value  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 1,057,629,854
Current Value $ 1,025,562,407
Investments At Contract Value  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 1,057,629,854
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Notes Receivable from Participants with interest rates ranging from 3.25% to 9.50% 3.25%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Notes Receivable from Participants with interest rates ranging from 3.25% to 9.50% 9.50%
Investment, Identifier [Axis]: Dodge and Cox, Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 130,041,732
Current Value $ 2,157,392,326
Investment, Identifier [Axis]: Empower Annuity Insurance Company | Capital Group Europacific Growth SA  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 47,386,442
Current Value $ 675,099,909
Investment, Identifier [Axis]: Fidelity Institutional Asset Management Trust Company, FIAM Small Cap Core Class  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 1,696,272
Current Value $ 392,754,889
Investment, Identifier [Axis]: Goldman Sachs | 2025 Term  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 4,854,284
Investment, Identifier [Axis]: Goldman Sachs | 2026 Term  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 70,630,762
Investment, Identifier [Axis]: Goldman Sachs | 2027 Term  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 76,850,411
Investment, Identifier [Axis]: Goldman Sachs | 2028 Term  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 76,789,019
Investment, Identifier [Axis]: Goldman Sachs | 2029 Term  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 69,608,771
Investment, Identifier [Axis]: Goldman Sachs | Intermediate Core  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 255,734,332
Investment, Identifier [Axis]: Jennison Associates, Harbor Capital Appreciation Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 137,512,631
Current Value $ 2,814,883,565
Investment, Identifier [Axis]: Loomis Sayles | Intermediate Gov/Credit  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 144,033,497
Investment, Identifier [Axis]: Morgan Stanley | Institutional Liquidity Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 29,448,036
Investment, Identifier [Axis]: Morgan Stanley, Institutional Liquidity Government Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 13,741,083
Current Value $ 13,741,083
Investment, Identifier [Axis]: Prudential | Core Conservative Int. Bond  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 154,537,652
Investment, Identifier [Axis]: Self Directed Brokerage Window, Self Directed Brokerage Window  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 390,391,341
Investment, Identifier [Axis]: Southwest Airlines Co. | Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 6,875,925
Current Value $ 582,676,679
Investment, Identifier [Axis]: Vanguard, 500 Index Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 9,292,964
Current Value $ 2,621,359,409
Investment, Identifier [Axis]: Vanguard, Vanguard Inst. Extended Market Index Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 910,895
Current Value $ 170,947,699
Investment, Identifier [Axis]: Vanguard, Vanguard Inst. Total Bond Market Index Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 1,539,481
Current Value $ 162,846,332
Investment, Identifier [Axis]: Vanguard, Vanguard Inst. Total Int. Stock Market Index Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 1,480,519
Current Value $ 252,073,091
Investment, Identifier [Axis]: Vanguard, Vanguard Short-term Inflation Protected Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 3,525,602
Current Value $ 87,505,435
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2030 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 7,990,558
Current Value $ 1,016,558,829
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2035 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 8,622,522
Current Value $ 1,129,032,995
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2040 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 7,357,346
Current Value $ 990,666,621
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2045 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 6,574,915
Current Value $ 909,507,968
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2050 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 6,063,743
Current Value $ 859,171,795
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2055 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 4,746,240
Current Value $ 672,684,663
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2060 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 2,456,778
Current Value $ 348,297,392
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2065 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 1,101,823
Current Value $ 156,150,292
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire 2070 Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 310,440
Current Value $ 52,166,405
Investment, Identifier [Axis]: Vanguard, Vanguard Target Retire Inc & Growth Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 6,398,843
Current Value $ 727,164,506
Investment, Identifier [Axis]: Voya | Wellington Intermediate Core  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 143,075,644
Investment, Identifier [Axis]: Wellington Trust Company, CIF II Core Bond Plus Series 4  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of shares or units held | shares 38,999,973
Current Value $ 356,849,750