Annual report pursuant to Section 13 and 15(d)

Long-term Debt - Schedule of Long-term Debt - Additional Information (Detail)

v3.6.0.2
Long-term Debt - Schedule of Long-term Debt - Additional Information (Detail) - Notes Payable
Dec. 31, 2016
Sep. 30, 2016
Jan. 02, 2016
5.95% notes, due 2017      
Debt Instrument [Line Items]      
Notes, stated percentage 5.95%   5.95%
3.50% notes, due 2021      
Debt Instrument [Line Items]      
Notes, stated percentage 3.50%   3.50%
6.00% notes, due 2033      
Debt Instrument [Line Items]      
Notes, stated percentage 6.00%   6.00%
6.45% notes, due 2037      
Debt Instrument [Line Items]      
Notes, stated percentage 6.45%   6.45%
0.625% notes, due 2023      
Debt Instrument [Line Items]      
Notes, stated percentage 0.625% 0.625%