ACCUMULATED OTHER COMPREHENSIVE LOSS ("AOCI") (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jan. 03, 2020	Jan. 01, 2021	Jun. 28, 2019	Jun. 29, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 3,363	$ 22,744	$ 3,278	$ 2,903
Other comprehensive income (loss), before income taxes	233	(443)
Income taxes	(47)	115
Other comprehensive income (loss) before reclassifications to earnings, net of income taxes	186	(328)	(505)	109
Losses (gains) reclassified to earnings	18	(6)
Income taxes	(5)	3
Losses (gains) reclassified to earnings, net of income taxes	13	(3)	0	0
Other comprehensive income (loss)	199	(331)	(505)	109
Ending balance	22,744	20,841	3,363	3,278
Foreign currency translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(106)	(81)
Other comprehensive income (loss), before income taxes	25	16
Income taxes	0	0
Other comprehensive income (loss) before reclassifications to earnings, net of income taxes	25	16
Losses (gains) reclassified to earnings	0	7
Income taxes	0	0
Losses (gains) reclassified to earnings, net of income taxes	0	7
Other comprehensive income (loss)	25	23
Ending balance	(81)	(58)	(106)
Net unrealized losses on hedging derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(38)	(55)
Other comprehensive income (loss), before income taxes	(23)	(41)
Income taxes	6	10
Other comprehensive income (loss) before reclassifications to earnings, net of income taxes	(17)	(31)
Losses (gains) reclassified to earnings	0	8
Income taxes	0	(2)
Losses (gains) reclassified to earnings, net of income taxes	0	6
Other comprehensive income (loss)	(17)	(25)
Ending balance	(55)	(80)	(38)
Unrecognized postretirement obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(563)	(372)
Other comprehensive income (loss), before income taxes	231	(418)
Income taxes	(53)	105
Other comprehensive income (loss) before reclassifications to earnings, net of income taxes	178	(313)
Losses (gains) reclassified to earnings	18	(21)
Income taxes	(5)	5
Losses (gains) reclassified to earnings, net of income taxes	13	(16)
Other comprehensive income (loss)	191	(329)
Ending balance	(372)	(701)	(563)
Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(707)	(508)	(202)	(276)
Other comprehensive income (loss)	199	(331)	(505)	109
Ending balance	$ (508)	$ (839)	$ (707)	$ (202)