Annual report pursuant to Section 13 and 15(d)

QUARTERLY INFORMATION (unaudited) - Additional Information (Detail)

v3.8.0.1
QUARTERLY INFORMATION (unaudited) - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Quarterly Financial Information [Line Items]    
Impact of pension mark-to-market $ 800 $ 2,651
Income tax benefit attributable to the 2017 Tax Cuts and Jobs Act 258  
Increase (decrease) in net income $ 349 $ 1,673
Increase (Decrease) In Earnings Per Share Basic $ 0.41 $ 1.91
Increase (Decrease) In Earnings Per Share Diluted $ 0.40 $ 1.91
U.S. Domestic Package    
Quarterly Financial Information [Line Items]    
Impact of pension mark-to-market $ 637 $ 1,908
International Package    
Quarterly Financial Information [Line Items]    
Impact of pension mark-to-market 35 425
Supply Chain & Freight    
Quarterly Financial Information [Line Items]    
Impact of pension mark-to-market $ 128 $ 318