Significant Accounting Policies and Recent Accounting Standards - Adoption of New Accounting Standards (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Mar. 31, 2017	Apr. 01, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax benefits	$ (69)	$ (62)	$ (199)	$ (198)
Earnings per diluted share (in usd per share)	$ 0.69	$ 1.34	$ 3.37	$ 1.31
New Accounting Pronouncement, Early Adoption, Effect | Adjustments for New Accounting Pronouncements
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax benefits	$ 9		$ 21
Earnings per diluted share (in usd per share)	$ 0.07		$ 0.17
Excess tax benefit related to shared-based compensation classified as cash provided by operating activities			$ 21