General - Statement of Operations (Details) - USD ($) $ / shares in Units, $ 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]
Other ship operating	$ 582	$ 605	$ 1,913	$ 1,842
Depreciation and amortization	399	414	1,206	1,229
Operating income	1,510	1,292	2,064	1,506
Income before income taxes	1,250	1,241	1,528	1,321
Net income	$ 1,216	$ 1,241	$ 1,487	$ 1,319
Earnings per share
Earnings Per Share, Basic (in dollars per share)	$ 1.56	$ 1.60	$ 1.91	$ 1.70
Earnings Per Share, Diluted (in dollars per share)	$ 1.56	$ 1.60	$ 1.91	$ 1.70
Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other ship operating		$ 605		$ 1,842
Depreciation and amortization		414		1,229
Operating income		1,292		1,506
Income before income taxes		1,241		1,321
Net income		$ 1,241		$ 1,319
Earnings per share
Earnings Per Share, Basic (in dollars per share)		$ 1.60		$ 1.70
Earnings Per Share, Diluted (in dollars per share)		$ 1.60		$ 1.70
As Previously Reported | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other ship operating		$ 599		$ 1,825
Depreciation and amortization		414		1,227
Operating income		1,298		1,525
Income before income taxes		1,247		1,340
Net income		$ 1,247		$ 1,338
Earnings per share
Earnings Per Share, Basic (in dollars per share)		$ 1.61		$ 1.72
Earnings Per Share, Diluted (in dollars per share)		$ 1.60		$ 1.72
Adjustment | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other ship operating		$ 6		$ 17
Depreciation and amortization		0		2
Operating income		(6)		(19)
Income before income taxes		(6)		(19)
Net income		$ (6)		$ (19)
Earnings per share
Earnings Per Share, Basic (in dollars per share)		$ (0.01)		$ (0.02)
Earnings Per Share, Diluted (in dollars per share)		$ 0.00		$ (0.02)