Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity Accumulated Other Comprehensive Income (Details)

v3.7.0.1
Stockholders' Equity Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 26, 2017
Mar. 27, 2016
Mar. 26, 2017
Mar. 27, 2016
Accumulated Other Comprehensive Income Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period     $ 428  
Balance at end of period $ 230   230  
Investment income, net 235 $ 127 417 $ 226
Foreign Currency Translation Adjustment [Member]        
Accumulated Other Comprehensive Income Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period     (161)  
Other comprehensive (loss) income before reclassifications     (10)  
Reclassifications from accumulated other comprehensive (loss) income     0  
Other comprehensive (loss) income     (10)  
Balance at end of period (171)   (171)  
Noncredit Other-than-Temporary Impairment Losses and Subsequent Changes in Fair Value for Certain Available-for-Sale Debt Securities [Member]        
Accumulated Other Comprehensive Income Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period     6  
Other comprehensive (loss) income before reclassifications     6  
Reclassifications from accumulated other comprehensive (loss) income     11  
Other comprehensive (loss) income     17  
Balance at end of period 23   23  
Net Unrealized Gain (Loss) on Other Available-for-Sale Securities [Member]        
Accumulated Other Comprehensive Income Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period     532  
Other comprehensive (loss) income before reclassifications     (141)  
Reclassifications from accumulated other comprehensive (loss) income     (59)  
Other comprehensive (loss) income     (200)  
Balance at end of period 332   332  
Net Unrealized Gain (Loss) on Derivative Instruments [Member]        
Accumulated Other Comprehensive Income Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period     51  
Other comprehensive (loss) income before reclassifications     (3)  
Reclassifications from accumulated other comprehensive (loss) income     (2)  
Other comprehensive (loss) income     (5)  
Balance at end of period 46   46  
Total Accumulated Other Comprehensive Income [Member]        
Accumulated Other Comprehensive Income Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period     428  
Other comprehensive (loss) income before reclassifications     (148)  
Reclassifications from accumulated other comprehensive (loss) income     (50)  
Other comprehensive (loss) income     (198)  
Balance at end of period 230   230  
Reclassification out of Accumulated Other Comprehensive Income [Member]        
Accumulated Other Comprehensive Income Attributable to Parent, Net of Tax [Roll Forward]        
Investment income, net $ 35 $ 11 $ 48 $ 18