Postretirement Benefit Plans - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended
	Mar. 30, 2018	Jun. 30, 2017	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017	Dec. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, matching contributions				$ 62,000,000
Stock issued during period, defined contribution plan (in shares)	81,329
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, voluntary contributions by employer during period	$ 301,000,000			301,000,000
Pension | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, voluntary contributions by employer during period	300,000,000	$ 400,000,000	$ 40,000,000	300,000,000	$ 143,000,000
Defined benefit plans, estimated future employer contributions in current fiscal year	$ 0			$ 0
U.S. SRP | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Value of defined benefit pension plan assets		4,400,000,000
Projected benefit obligation of defined pension plan		$ 5,600,000,000
Cash balance percentage to replace frozen benefits under defined pension plan						1.00%
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer contribution matching percentage				2.00%
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer contribution matching percentage				6.00%