Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Details Textual) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended		3 Months Ended
	Feb. 22, 2018 USD ($) $ / shares	Dec. 31, 2017 $ / shares	Jan. 28, 2018 USD ($) employee_stock_purchase_plan shares	Jan. 29, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Equity [Line Items]
Amount authorized by board of directors to repurchase shares					$ 3,000	$ 2,000
Remaining authorized repurchase amount			$ 2,800
Dividends declared per share (in dollars per share) | $ / shares		$ 0.10
Payments of dividends			$ 106	$ 108
Number of employee stock purchase plans | employee_stock_purchase_plan			2
Employee Stock
Equity [Line Items]
Total unrecognized compensation expense			$ 481
Weighted average period for unrecognized compensation expense to be recognized (in years)			2 years 10 months 25 days
Performance Shares
Equity [Line Items]
Additional performance-based awards to be earned upon certain levels of achievement (in shares) | shares			1
Award measurement period			3 years
Performance Shares | Min
Equity [Line Items]
Award vesting rights, percentage of target amount			0.00%
Performance Shares | Maximum
Equity [Line Items]
Award vesting rights, percentage of target amount			200.00%
Employee Stock Purchase Plan, United States
Equity [Line Items]
Number of employee stock purchase plans | employee_stock_purchase_plan			1
Employee Stock Purchase Plan, Foreign
Equity [Line Items]
Number of employee stock purchase plans | employee_stock_purchase_plan			1
ESIP | Employee Stock Option
Equity [Line Items]
Number of shares available for grant (in shares) | shares			82
Employee Stock Purchase Plan | Employee Stock Option
Equity [Line Items]
Number of shares available for grant (in shares) | shares			20
Subsequent Event
Equity [Line Items]
Amount authorized by board of directors to repurchase shares	$ 6,000
Dividends declared per share (in dollars per share) | $ / shares	$ 0.20