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Income Taxes (Activity Related To Gross Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance as of the beginning of the year $ 316 $ 305 $ 306
Increases related to current year tax positions 19 38 35
Increases related to prior year tax positions 8 5 31
Increase related to AdvancePierre acquisition 0 9 0
Reductions related to prior year tax positions (18) (27) (48)
Reductions related to settlements (8) (4) (7)
Reductions related to expirations of statute of limitations (9) (10) (12)
Balance as of the end of the year $ 308 $ 316 $ 305