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Employee and Retiree Benefits (Narrative) (Details)	1 Months Ended		3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Nov. 25, 2017
Retirement Benefits [Abstract]
Postretirement health care benefits age requirement before distribution occurs			55 years
Postretirement health care benefits continuous service requirement			15 years
Dollar cap liability reduction		10.00%
Postretirement health care retiree age requirement	65 years	65 years

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