General (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2021	Apr. 03, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (368)	$ (3,068)
Increase (decrease)	(807)	520
Income tax impact	(5)	(141)
Other comprehensive income (loss) before reclassifications, net of income taxes	(812)	379
Increase (decrease)	(139)	(128)
Income tax impact	(3)	26
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	(142)	(102)
Net current period other comprehensive income (loss), net of income taxes	(954)	277
Ending balance	(1,322)	(2,791)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	745	(2,173)
Increase (decrease)	(917)	(132)
Income tax impact	(5)	(22)
Other comprehensive income (loss) before reclassifications, net of income taxes	(922)	(154)
Increase (decrease)	0	0
Income tax impact	0	0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0	0
Net current period other comprehensive income (loss), net of income taxes	(922)	(154)
Ending balance	(177)	(2,327)
Pension & Postretirement Plan Benefit Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(928)	(781)
Increase (decrease)	0	0
Income tax impact	0	0
Other comprehensive income (loss) before reclassifications, net of income taxes	0	0
Increase (decrease)	13	11
Income tax impact	(3)	(3)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	10	8
Net current period other comprehensive income (loss), net of income taxes	10	8
Ending balance	(918)	(773)
Unrealized Gain (Loss) on Available-For-Sale Securities Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0	(1)
Increase (decrease)	0	1
Income tax impact	0	0
Other comprehensive income (loss) before reclassifications, net of income taxes	0	1
Increase (decrease)	0	0
Income tax impact	0	0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0	0
Net current period other comprehensive income (loss), net of income taxes	0	1
Ending balance	0	0
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(185)	(113)
Increase (decrease)	110	651
Income tax impact	0	(119)
Other comprehensive income (loss) before reclassifications, net of income taxes	110	532
Increase (decrease)	(152)	(139)
Income tax impact	0	29
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	(152)	(110)
Net current period other comprehensive income (loss), net of income taxes	(42)	422
Ending balance	$ (227)	$ 309