Supplemental Financial Information - Accumulated other comprehensive income (loss) (Details) $ in Millions	6 Months Ended
	Jul. 03, 2022 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 6,770
Other comprehensive income (loss) before reclassifications	(112)
Amounts reclassified out of accumulated other comprehensive income (loss)	8
Other comprehensive income (loss)	4
Other comprehensive income (loss)	(100)
Ending balance	7,226
Currency  translation differences
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	207
Other comprehensive income (loss) before reclassifications	(87)
Amounts reclassified out of accumulated other comprehensive income (loss)	0
Other comprehensive income (loss)	0
Other comprehensive income (loss)	(87)
Ending balance	120
Change in fair  value cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	0
Other comprehensive income (loss) before reclassifications	(24)
Amounts reclassified out of accumulated other comprehensive income (loss)	8
Other comprehensive income (loss)	4
Other comprehensive income (loss)	(12)
Ending balance	(12)
Net actuarial gain/(losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(159)
Other comprehensive income (loss) before reclassifications	(1)
Amounts reclassified out of accumulated other comprehensive income (loss)	0
Other comprehensive income (loss)	0
Other comprehensive income (loss)	(1)
Ending balance	(160)
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	48
Ending balance	$ (52)