Share-Based Associate Compensation Plans (Stock Option Information) (Details) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Shares
Outstanding at beginning of year (in shares) | shares	3,274
Granted (in shares) | shares	704
Exercised (in shares) | shares	(493)
Forfeited or expired (in shares) | shares	(48)
Outstanding at end of year (in shares) | shares	3,437
Options exercisable at end of period (in shares) | shares	2,139
Weighted-average exercise price
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 56.08
Granted (in dollars per share) | $ / shares	85.67
Exercised (in dollars per share) | $ / shares	42.57
Forfeited or expired (in dollars per share) | $ / shares	63.46
Outstanding at end of year (in dollars per share) | $ / shares	63.99
Options exercisable at end of period (in dollars per share) | $ / shares	$ 55.25
Aggregate intrinsic value
Outstanding at end of year | $	$ 141
Options exercisable at end of period | $	$ 107
Weighted-average remaining contractual life
Outstanding option shares at December 31, 2019	6 years 1 month 17 days
Options exercisable at end of period	4 years 8 months 15 days