Significant Accounting Policies and Recent Accounting Standards - Effect of ASC 606 on Condensed Consolidated Balance Sheet (Unaudited) (Details) - USD ($) $ in Millions	Sep. 28, 2018	Jun. 29, 2018	Sep. 29, 2017	Jun. 30, 2017
Current Assets
Cash and cash equivalents	$ 305	$ 288	$ 388	$ 484
Receivables	432	466
Contract assets	870	782
Inventories	413	411
Income taxes receivable	151	174
Other current assets	117	103
Total current assets	2,288	2,224
Non-current Assets
Property, plant and equipment	898	900
Goodwill	5,373	5,372
Other intangible assets	960	989
Non-current deferred income taxes	117	119
Other non-current assets	253	247
Total non-current assets	7,601	7,627
Total assets	9,889	9,851
Current Liabilities
Short-term debt	294	78
Accounts payable	480	622
Advanced payments and unearned income		0
Contract liabilities	410	372
Compensation and benefits	125	142
Other accrued items	321	317
Income taxes payable	21	15
Current portion of long-term debt, net	305	304
Total current liabilities	1,956	1,850
Non-current Liabilities
Defined benefit plans	674	714
Long-term debt, net	3,410	3,408
Non-current deferred income taxes	84	79
Other long-term liabilities	521	522
Total non-current liabilities	4,689	4,723
Shareholders’ Equity:
Common stock	118	118
Other capital	1,648	1,714
Retained earnings	1,680	1,648
Accumulated other comprehensive loss	(202)	(202)
Total shareholders’ equity	3,244	3,278	$ 2,960	$ 2,903
Total liabilities and equity	$ 9,889	9,851
As Reported
Current Assets
Cash and cash equivalents		288
Receivables		735
Contract assets		0
Inventories		925
Income taxes receivable		174
Other current assets		101
Total current assets		2,223
Non-current Assets
Property, plant and equipment		900
Goodwill		5,372
Other intangible assets		989
Non-current deferred income taxes		116
Other non-current assets		239
Total non-current assets		7,616
Total assets		9,839
Current Liabilities
Short-term debt		78
Accounts payable		622
Advanced payments and unearned income		314
Contract liabilities		0
Compensation and benefits		142
Other accrued items		313
Income taxes payable		15
Current portion of long-term debt, net		304
Total current liabilities		1,788
Non-current Liabilities
Defined benefit plans		714
Long-term debt, net		3,408
Non-current deferred income taxes		90
Other long-term liabilities		517
Total non-current liabilities		4,729
Shareholders’ Equity:
Common stock		118
Other capital		1,714
Retained earnings		1,692
Accumulated other comprehensive loss		(202)
Total shareholders’ equity		3,322
Total liabilities and equity		9,839
Restatement Adjustment | Effect of Adopting ASC 606
Current Assets
Cash and cash equivalents		0
Receivables		(269)
Contract assets		782
Inventories		(514)
Income taxes receivable		0
Other current assets		2
Total current assets		1
Non-current Assets
Property, plant and equipment		0
Goodwill		0
Other intangible assets		0
Non-current deferred income taxes		3
Other non-current assets		8
Total non-current assets		11
Total assets		12
Current Liabilities
Short-term debt		0
Accounts payable		0
Advanced payments and unearned income		(314)
Contract liabilities		372
Compensation and benefits		0
Other accrued items		4
Income taxes payable		0
Current portion of long-term debt, net		0
Total current liabilities		62
Non-current Liabilities
Defined benefit plans		0
Long-term debt, net		0
Non-current deferred income taxes		(11)
Other long-term liabilities		5
Total non-current liabilities		(6)
Shareholders’ Equity:
Common stock		0
Other capital		0
Retained earnings		(44)
Accumulated other comprehensive loss		0
Total shareholders’ equity		(44)
Total liabilities and equity		$ 12