Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Dec. 31, 2019	Dec. 31, 2018
Non-cash Investing and Financing Activities [Abstract]
Declared but unpaid dividends	$ 89	$ 78
Issuance of stock upon vesting of restricted stock units	81	76
Cash and Cash Equivalents	5,818		$ 2,399
Restricted Cash Included in Other Current Assets	18		21
Restricted Cash Included in Other Assets	1		2
Cash, Cash Equivalents and Restricted Cash	$ 5,837	$ 2,314	$ 2,422	$ 2,117
Restricted Cash and Cash Equivalents, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsCurrent
Restricted Cash and Cash Equivalents, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent