Income Taxes - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2018	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017	May 31, 2018
Income Tax Disclosure [Abstract]
Effective tax rate		20.60%	32.00%	22.30%	35.40%
Income tax benefit related to lower statutory Income tax rate on earnings		$ 150		$ 285
Income tax benefit from accelerated deductions to be claimed on 2018 tax return				$ 60
Recognition of benefit from TCJA						$ 225
Tax Cuts And Jobs Act Of 2017,Recognition of Benefit per diluted share						$ 0.94
Provisional benefit related to remeasurement of net U.S. deferred tax liability	$ (1,150)
Provisional benefit related to remeasurement of net U.S. deferred tax liability, income tax expense amount recognized		$ 4