Subsequent Events (Details)			3 Months Ended						9 Months Ended
	Feb. 04, 2016 USD ($) day $ / shares	Jan. 29, 2016 USD ($) shares	Mar. 31, 2017 $ / shares	Dec. 30, 2016 $ / shares	Sep. 30, 2016 $ / shares	Jul. 01, 2016 $ / shares	Jan. 01, 2016 $ / shares	Jan. 02, 2015 $ / shares	Jan. 01, 2016 $ / shares	Jan. 02, 2015 $ / shares
Subsequent Event [Line Items]
Cash dividends declared per common share (in usd per share) | $ / shares							$ 0.15	$ 0.15	$ 0.45	$ 0.45
Subsequent Event
Subsequent Event [Line Items]
Capital return program, authorized amount of distributions	$ 5,000,000,000	$ 2,000,000,000
Capital return program, additional authorized amount of distributions	1,000,000,000
Capital return program, expected distributions, special dividend	$ 2,700,000,000
Capital return program, expected distributions, special dividend (in usd per share) | $ / shares	$ 4.00
Capital return program, expected distributions, accelerated share repurchases	$ 2,300,000,000
Information Management | Discontinued Operations, Disposed of by Sale | Subsequent Event
Subsequent Event [Line Items]
Cash consideration		$ 6,600,000,000
Common Class B | Information Management | Discontinued Operations, Disposed of by Sale | Subsequent Event
Subsequent Event [Line Items]
Shares received | shares		40,000,000
Common Stock | Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared per common share (in usd per share) | $ / shares	$ 0.15
Convertible Senior Notes Due 2021 | Convertible Debt | Subsequent Event
Subsequent Event [Line Items]
Principal amount	$ 500,000,000
Stated interest rate (as a percent)	2.50%
Conversion price (in usd per share) | $ / shares	$ 21.00
Conversion premium (as a percent)	150.00%
Threshold trading days | day	20
Threshold consecutive trading days	30 days
Repurchase price, percentage of principal amount plus accrued interest	100.00%
Scenario, Forecast | Common Stock
Subsequent Event [Line Items]
Cash dividends declared per common share (in usd per share) | $ / shares			$ 0.075	$ 0.075	$ 0.075	$ 0.075