Long-term debt - Narrative (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	Mar. 01, 2023	Jul. 01, 2023	Apr. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Notional amount of derivative		$ 7,783			$ 7,783		$ 7,372
Unrealized gain (loss) on cash flow hedges, pre-tax		$ 15		$ 74	(3)	$ 151
Cash Flow Hedging | Interest expense
Debt Instrument [Line Items]
Unrealized gain (loss) on cash flow hedges, pre-tax					$ 71	$ 82
5.25% 10-year U.S. Dollar Notes Due 2033
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Net proceeds after discount and underwriting commissions	$ 396
Notional amount of derivative	$ 400
Debt Instrument, Interest Rate, Effective Percentage	3.06%
5.25% 10-year U.S. Dollar Notes Due 2033 | Cash Flow Hedging | Interest expense
Debt Instrument [Line Items]
Unrealized gain (loss) on cash flow hedges, pre-tax			$ 47
Cumulative unrealized gain (loss) on cash flow hedge settlement, pre-tax			$ 91
2.75% 10-year U.S. Dollar Notes Due 2023
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 210
Debt Instrument, Interest Rate, Stated Percentage	2.75%