Debt - Narrative (Details) € in Millions, $ in Millions, $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	May 31, 2018 USD ($)	May 31, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Dec. 30, 2017 USD ($)	Jul. 01, 2017 CAD ($)	May 31, 2017 EUR (€)
Debt Instrument [Line Items]
Proceeds from debt, net of issuance costs	$ 994
Interest Expense, Debt			$ 72	$ 63	$ 141	$ 124
Notional amounts of interest rate swaps			4,030		4,030		$ 4,966
US Dollar Interest Rate Swap [Member]
Debt Instrument [Line Items]
Notional amounts of interest rate swaps			$ 1,500		$ 1,500
4.30% U.S. Dollar Notes Due 2028
Debt Instrument [Line Items]
Debt instrument, face amount	$ 600
Debt instrument, stated interest rate	4.30%
3.25% U.S. Dollar Notes Due 2021
Debt Instrument [Line Items]
Debt instrument, face amount	$ 400
Debt instrument, stated interest rate	3.25%
3.25% U.S. Dollar Notes Due 2018
Debt Instrument [Line Items]
Debt instrument, face amount	$ 400
Debt instrument, stated interest rate	3.25%
0.80% Euro Notes Due 2022
Debt Instrument [Line Items]
Debt instrument, face amount				$ 685		$ 685			€ 600
Proceeds from debt, net of issuance costs		$ 656
Debt instrument, stated interest rate		0.80%							0.80%
1.75% U.S. Dollar Notes Due 2017
Debt Instrument [Line Items]
Debt instrument, face amount		$ 400
Debt instrument, stated interest rate		1.75%							1.75%
2.05% Canadian Dollar Notes Due 2017
Debt Instrument [Line Items]
Debt instrument, face amount								$ 300
Debt instrument, stated interest rate				2.05%		2.05%		2.05%
Notes Payable, Other Payables | 4.30% U.S. Dollar Notes Due 2028
Debt Instrument [Line Items]
Debt instrument term	10 years
Notes Payable, Other Payables | 3.25% U.S. Dollar Notes Due 2021
Debt Instrument [Line Items]
Debt instrument term	3 years
Notes Payable, Other Payables | 3.25% U.S. Dollar Notes Due 2018
Debt Instrument [Line Items]
Debt instrument term					7 years
Notes Payable, Other Payables | 0.80% Euro Notes Due 2022
Debt Instrument [Line Items]
Debt instrument term					5 years
Notes Payable, Other Payables | 1.75% U.S. Dollar Notes Due 2017
Debt Instrument [Line Items]
Debt instrument term						5 years
Notes Payable, Other Payables | 2.05% Canadian Dollar Notes Due 2017
Debt Instrument [Line Items]
Debt instrument term						3 years
Notes Payable, Other Payables | 4.15% U.S. Dollar Notes Due 2019
Debt Instrument [Line Items]
Debt instrument term					10 years
Debt instrument, stated interest rate			4.15%		4.15%
Effective interest rate			3.50%		3.50%
Notes Payable, Other Payables | 4.0% U.S. Dollar Notes Due 2020
Debt Instrument [Line Items]
Debt instrument term					10 years
Debt instrument, stated interest rate			4.00%		4.00%
Effective interest rate			3.39%		3.39%
Notes Payable, Other Payables | 3.125% U.S. Dollar Notes Due 2022
Debt Instrument [Line Items]
Debt instrument term					10 years
Debt instrument, stated interest rate			3.13%		3.13%
Effective interest rate			3.87%		3.87%
Notes Payable, Other Payables | 2.75% U.S. Dollar Notes Due 2023
Debt Instrument [Line Items]
Debt instrument term					10 years
Debt instrument, stated interest rate			2.75%		2.75%
Effective interest rate			4.00%		4.00%
Notes Payable, Other Payables | 2.65% U.S. Dollar Note Due 2023
Debt Instrument [Line Items]
Debt instrument term					7 years
Debt instrument, stated interest rate			2.65%		2.65%
Effective interest rate			3.42%		3.42%
Notes Payable, Other Payables | 1.00% Euro Notes Due 2024
Debt Instrument [Line Items]
Debt instrument term					8 years
Debt instrument, stated interest rate			1.00%		1.00%
Effective interest rate			0.72%		0.72%
Notes Payable, Other Payables | 1.25% Euro Notes Due 2025
Debt Instrument [Line Items]
Debt instrument term					10 years
Debt instrument, stated interest rate			1.25%		1.25%
Effective interest rate			1.30%		1.30%
Notes Payable, Other Payables | 3.25% U.S. Dollar Notes Due 2026
Debt Instrument [Line Items]
Debt instrument term					10 years
Debt instrument, stated interest rate			3.25%		3.25%
Effective interest rate			4.06%		4.06%