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Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Unrecognized Tax Benefits [Roll Forward]    
Balance at January 1 $ 588.0 [1] $ 647.0
Decreases for positions taken in prior years (133.0) (82.0)
Increases for positions taken in prior years 131.0 28.0
Increases for positions related to the current year 47.0 41.0
Settlements with taxing authorities (172.0) (45.0)
Lapsing of statutes of limitations 0.0 0.0
Balance at December 31 [1] 461.0 588.0
Long-term income taxes    
Unrecognized Tax Benefits [Roll Forward]    
Balance at January 1 319.0  
Balance at December 31 421.0 319.0
Prepaid expenses and other current assets    
Unrecognized Tax Benefits [Roll Forward]    
Balance at January 1 269.0  
Balance at December 31 $ 40.0 $ 269.0
[1] Of this amount, $421 million and $319 million are included in Long-term income taxes for 2024 and 2023, respectively, and $40 million and $269 million are included in Income taxes for 2024 and 2023, respectively, on the Consolidated Balance Sheet.