General (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2021	Jul. 03, 2020	Jul. 02, 2021	Jul. 03, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (1,322)	$ (2,791)	$ (368)	$ (3,068)
Increase (decrease)	610	717	(197)	1,237
Income tax impact	(10)	80	(15)	(61)
Other comprehensive income (loss) before reclassifications, net of income taxes	600	797	(212)	1,176
Increase (decrease)	51	167	(88)	39
Income tax impact	(4)	(36)	(7)	(10)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	47	131	(95)	29
Net current period other comprehensive income (loss), net of income taxes	647	928	(307)	1,205
Ending balance	(675)	(1,863)	(675)	(1,863)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(177)	(2,327)	745	(2,173)
Increase (decrease)	419	1,071	(498)	939
Income tax impact	(10)	6	(15)	(16)
Other comprehensive income (loss) before reclassifications, net of income taxes	409	1,077	(513)	923
Increase (decrease)	0	0	0	0
Income tax impact	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0	0	0	0
Net current period other comprehensive income (loss), net of income taxes	409	1,077	(513)	923
Ending balance	232	(1,250)	232	(1,250)
Pension & Postretirement Plan Benefit Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(918)	(773)	(928)	(781)
Increase (decrease)	0	0	0	0
Income tax impact	0	0	0	0
Other comprehensive income (loss) before reclassifications, net of income taxes	0	0	0	0
Increase (decrease)	15	11	28	22
Income tax impact	(4)	(3)	(7)	(6)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	11	8	21	16
Net current period other comprehensive income (loss), net of income taxes	11	8	21	16
Ending balance	(907)	(765)	(907)	(765)
Unrealized Gain (Loss) on Available-For-Sale Securities Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0	0	0	(1)
Increase (decrease)	(1)	0	(1)	1
Income tax impact	0	0	0	0
Other comprehensive income (loss) before reclassifications, net of income taxes	(1)	0	(1)	1
Increase (decrease)	0	0	0	0
Income tax impact	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0	0	0	0
Net current period other comprehensive income (loss), net of income taxes	(1)	0	(1)	1
Ending balance	(1)	0	(1)	0
Cash Flow Hedge Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(227)	309	(185)	(113)
Increase (decrease)	192	(354)	302	297
Income tax impact	0	74	0	(45)
Other comprehensive income (loss) before reclassifications, net of income taxes	192	(280)	302	252
Increase (decrease)	36	156	(116)	17
Income tax impact	0	(33)	0	(4)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	36	123	(116)	13
Net current period other comprehensive income (loss), net of income taxes	228	(157)	186	265
Ending balance	$ 1	$ 152	$ 1	$ 152