v3.26.1
Employee Benefit Plan, Fair Value and NAV (Details) - EBP 004 [Member] - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 4,720,697,494 $ 4,235,568,766
Investments, net appreciation (depreciation) in the fair value 710,438,949 579,618,771
Investment, Identifier [Axis]: AB Discovery Value Fund Class Z    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 114,897,285 130,774,077
Investments, net appreciation (depreciation) in the fair value (3,996,918) (4,907,759)
Investment, Identifier [Axis]: Fidelity 500 Index Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, net appreciation (depreciation) in the fair value 0 152,459,323
Investment, Identifier [Axis]: Fidelity Contrafund Commingled Pool Class D    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, net appreciation (depreciation) in the fair value 0 162,976,569
Investment, Identifier [Axis]: Fidelity Contrafund Commingled Pool Class F    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 555,208,474 511,152,193
Investments, net appreciation (depreciation) in the fair value 108,031,600 (21,771,992)
Investment, Identifier [Axis]: Fidelity Diversified International Commingled Pool Class C    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 180,668,875 153,771,132
Investments, net appreciation (depreciation) in the fair value 42,114,722 10,608,980
Investment, Identifier [Axis]: Fidelity Freedom Blend 2005 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Investments, net appreciation (depreciation) in the fair value 0 39,862
Investment, Identifier [Axis]: Fidelity Freedom Blend 2010 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 7,065,617 6,322,733
Investments, net appreciation (depreciation) in the fair value 686,914 448,720
Investment, Identifier [Axis]: Fidelity Freedom Blend 2015 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 10,047,845 9,910,597
Investments, net appreciation (depreciation) in the fair value 1,206,753 619,962
Investment, Identifier [Axis]: Fidelity Freedom Blend 2020 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 30,242,395 33,240,211
Investments, net appreciation (depreciation) in the fair value 4,261,738 2,479,985
Investment, Identifier [Axis]: Fidelity Freedom Blend 2025 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 86,925,940 87,050,854
Investments, net appreciation (depreciation) in the fair value 12,944,451 6,936,287
Investment, Identifier [Axis]: Fidelity Freedom Blend 2030 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 157,927,279 149,037,005
Investments, net appreciation (depreciation) in the fair value 24,576,443 12,630,081
Investment, Identifier [Axis]: Fidelity Freedom Blend 2035 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 280,083,679 240,731,405
Investments, net appreciation (depreciation) in the fair value 45,086,436 22,130,547
Investment, Identifier [Axis]: Fidelity Freedom Blend 2040 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 333,908,504 281,108,386
Investments, net appreciation (depreciation) in the fair value 59,378,603 32,272,378
Investment, Identifier [Axis]: Fidelity Freedom Blend 2045 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 356,931,206 293,645,061
Investments, net appreciation (depreciation) in the fair value 66,787,763 34,587,294
Investment, Identifier [Axis]: Fidelity Freedom Blend 2050 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 395,942,381 329,621,593
Investments, net appreciation (depreciation) in the fair value 74,940,280 38,826,659
Investment, Identifier [Axis]: Fidelity Freedom Blend 2055 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 329,129,549 255,551,019
Investments, net appreciation (depreciation) in the fair value 60,403,604 29,105,586
Investment, Identifier [Axis]: Fidelity Freedom Blend 2060 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 190,536,326 144,257,385
Investments, net appreciation (depreciation) in the fair value 34,551,512 15,638,293
Investment, Identifier [Axis]: Fidelity Freedom Blend 2065 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 50,445,600 33,031,153
Investments, net appreciation (depreciation) in the fair value 8,751,915 2,991,776
Investment, Identifier [Axis]: Fidelity Freedom Blend 2070 Commingled Pool Class T    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,111,463 46
Investments, net appreciation (depreciation) in the fair value 96,950 0
Investment, Identifier [Axis]: Fidelity Freedom Blend Income Commingled Pool Class T/Retirement Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 11,368,039 10,152,441
Investments, net appreciation (depreciation) in the fair value 1,058,703 371,296
Investment, Identifier [Axis]: Fidelity Government Money Market Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,448,155 999,832
Investment, Identifier [Axis]: JPMCB Large Cap Growth CF-A Class    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 266,542,693 259,636,627
Investments, net appreciation (depreciation) in the fair value 34,654,258 66,844,001
Investment, Identifier [Axis]: Omnicom Group Inc. Common Stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 91,300,000 102,300,000
Investment, Identifier [Axis]: PIMCO Total Return Fund Institutional Class    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 107,877,219 103,884,862
Investments, net appreciation (depreciation) in the fair value 4,583,103 (2,113,251)
Investment, Identifier [Axis]: Spartan 500 Index Pool Class D    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 707,678,562 661,722,526
Investments, net appreciation (depreciation) in the fair value 112,515,534 (22,968,250)
Investment, Identifier [Axis]: State Street Global All Cap Equity Ex-U.S. Index Fund Class II    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 34,019,458 19,147,439
Investments, net appreciation (depreciation) in the fair value 7,048,715 964,563
Investment, Identifier [Axis]: State Street Russell Small/Mid Cap Index Fund Class II    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 41,406,775 36,091,574
Investments, net appreciation (depreciation) in the fair value 4,549,150 5,019,805
Investment, Identifier [Axis]: State Street U.S. Bond Index Fund Class XIV    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 33,975,884 24,887,631
Investments, net appreciation (depreciation) in the fair value 1,921,554 308,559
Investment, Identifier [Axis]: T. Rowe Price Institutional Large Cap Value Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 159,748,079 162,743,008
Investments, net appreciation (depreciation) in the fair value (428,827) 4,983,480
Investment, Identifier [Axis]: Vanguard FTSE Social Index Fund IS    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 75,878,288 69,692,745
Investments, net appreciation (depreciation) in the fair value 10,844,179 14,377,290
Investment, Identifier [Axis]: William Blair Small-Mid Cap Growth CIT    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 108,415,604 125,132,900
Investments, net appreciation (depreciation) in the fair value 300,147 13,502,174
Company Stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 91,266,320 102,272,331
Company Stock | Investment, Identifier [Axis]: Empower Guaranteed Income Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 191,584  
Company Stock | Investment, Identifier [Axis]: Fidelity Managed Income Portfolio II    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 194,868,030  
Company Stock | Investment, Identifier [Axis]: Omnicom Group Inc. Common Stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 91,266,320 102,272,331
Investments, net appreciation (depreciation) in the fair value $ (6,430,333) $ 256,553