Share-Based Compensation - Long-term Incentive Plan, Deferred Income Plan, compensation expense, stock options and restricted stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Compensation expense included in net income
Compensation expense	$ 35	$ 77	$ 71
Income tax benefit	(8)	(28)	(26)
Total net compensation expense included in net income	27	49	45
Compensation costs associated with unvested awards not recognized	30
Attribution of fair value of options issued and portion of previously granted options for which requisite service has been rendered	$ 23	$ 20	$ 20
Recognize compensation expense for unvested awards subject only to service conditions over a weighted average period	2 years
2015 Long Term Incentive Plan
Share-Based Compensation
Maximum shares awarded for issuance	17,000
Deferred Income Plan
Share-Based Compensation
Maximum percentage of annual long term incentive and other compensation of Executives	80.00%
Stock Options
Share-Based Compensation
Maximum term of options	10 years
Vesting period	3 years
Weighted-average assumptions used in Black-Scholes option-pricing model
Fair value of options at grant date	$ 15.83	$ 13.80	$ 10.33
Dividend yield (as a percent)	0.10%	0.20%	0.20%
Expected volatility (as a percent)	26.60%	29.20%	33.60%
Risk-free interest rate (as a percent)	2.60%	1.90%	1.20%
Expected term (in years)	4 years 8 months 12 days	4 years 8 months 12 days	4 years 9 months 18 days
Number of Options
Outstanding at beginning of year (in shares)	9,238
Granted	1,353
Exercised	(2,098)
Forfeited or expired	(209)
Outstanding at end of year (in shares)	8,284	9,238
Exercisable at end of year (in shares)	5,391
Weighted-Average Exercise Price
Outstanding at beginning of year (in dollars per share)	$ 37.02
Granted	58.22
Exercised	(35.30)
Forfeited or expired	(50.49)
Outstanding at end of year (in dollars per share)	40.58	$ 37.02
Exercisable at end of year (in dollars per share)	$ 34.95
Additional information
Aggregate intrinsic value of outstanding options	$ 66
Weighted-average remaining contractual life of outstanding stock options	6 years
Aggregate intrinsic value of exercisable options	$ 60
Weighted-average remaining contractual life of exercisable options	5 years
Aggregate intrinsic value of options exercised	$ 62	$ 29	$ 15
Stock Options | 2015 Long Term Incentive Plan
Share-Based Compensation
Maximum shares awarded for issuance	17,000
Restricted stock, restricted stock units, performance stock and other awards | 2015 Long Term Incentive Plan
Share-Based Compensation
Maximum shares awarded for issuance	4,250