Equity Narrative (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Equity, Class of Treasury Stock [Line Items]
Direct Stock Purchase and Dividend Reinvestment Plan number of shares issued	less than one million	less than one million	less than one million
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	14.0	6.5	4.9
Shares issued to employees and directors under various benefit plans and stock purchase programs	15.0	8.0	7.0
Common stock repurchases (in shares)	4.0	5.0	7.0
Common stock repurchased	$ 220	$ 320	$ 516
2018 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	1,500
2020 share repurchase program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 1,500