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Stock-Based Compensation Plans - Additional Information (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) plan $ / shares shares	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of active stock plans | plan	1
Shares authorized under plans (in shares) | shares	55
Shares available for grant under plans (in shares) | shares	10
Compensation expense from award	$ 239	$ 170	$ 244
Recognized tax benefit from stock-based compensation arrangements	50	34	92
Amended and Restated 2004 Stock Incentive Plan | Cash-Settled Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash payments to settle awards	$ 15	39	42
Amended and Restated 2004 Stock Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Total fair value of awards vested	$ 122	139	110
Unrecognized compensation expense related to unvested awards, awards other than options	$ 157
Weighted-average period of recognition of unrecognized compensation costs (Years)	1 year 9 months 18 days
Amended and Restated 2004 Stock Incentive Plan | Performance Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Total fair value of awards vested	$ 82	$ 92	$ 90
Unrecognized compensation expense related to unvested awards, awards other than options	$ 42
Weighted-average period of recognition of unrecognized compensation costs (Years)	1 year
Amended and Restated 2004 Stock Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Maximum contractual term (in years)	10 years
Weighted-average fair value of options granted (in dollars per share) | $ / shares	$ 0	$ 0	$ 21.48
Intrinsic value of stock options exercised	$ 10	$ 94	$ 92
Associate Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense from award	$ 25	$ 23	$ 23
Minimum | Amended and Restated 2004 Stock Incentive Plan | Performance Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential annual reduction in vesting based on performance (percent)	50.00%
Percentage of target award opportunities	0.00%
Maximum | Amended and Restated 2004 Stock Incentive Plan | Performance Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential annual reduction in vesting based on performance (percent)	100.00%
Percentage of target award opportunities	150.00%

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