General - Statement of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 1,216	$ 1,241	$ 1,487	$ 1,319
Depreciation and amortization	$ 399	414	1,206	1,229
Inventories			35	15
Insurance recoverables, prepaid expenses and other			94	421
Claims reserves and accrued and other liabilities			$ (19)	(381)
Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		1,241		1,319
Depreciation and amortization		414		1,229
Inventories				15
Insurance recoverables, prepaid expenses and other				421
Claims reserves and accrued and other liabilities				(381)
As Previously Reported | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		1,247		1,338
Depreciation and amortization		414		1,227
Inventories				15
Insurance recoverables, prepaid expenses and other				402
Claims reserves and accrued and other liabilities				(379)
Adjustment | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		(6)		(19)
Depreciation and amortization		$ 0		2
Inventories				0
Insurance recoverables, prepaid expenses and other				19
Claims reserves and accrued and other liabilities				$ (2)