Stockholders' Equity and Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions				12 Months Ended
	Apr. 17, 2023 $ / shares shares	Jul. 22, 2022 USD ($) shares	Apr. 15, 2022 $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Jul. 16, 2013 shares
Repurchase of common stock authorized, shares | shares							20,000,000
Stock repurchase program, remaining number of shares authorized to be repurchased, shares | shares				20,000,000
Aggregate intrinsic value of options exercised				$ 259	$ 288	$ 446
Cash receipts due to exercise of options				148	130	167
Employee service share-based compensation, tax benefit from exercise of stock options				80	85	118
Tax benefit				$ 51	$ 61	$ 95
Aggregate number of shares withheld to satisfy tax requirement | shares				369,000	362,000
Aggregate value of shares withheld to satisfy tax requirement				$ 80	$ 99
2007 Omnibus Incentive Plan
Total number of authorized shares to be issued under the 2007 Omnibus Incentive Plan, shares | shares				135,000,000
Common shares reserved for issuance under the 2007 Omnibus Incentive Plan, shares | shares				50,000,000
Stock options
Total unrecognized compensation cost				$ 205
Weighted average period for cost to be recognized (in years)				2 years
Weighted average grant date fair value (in usd per share) | $ / shares				$ 68.92	$ 71.35	$ 57.36
Employee service share-based compensation, tax benefit from exercise of stock options				$ 48	$ 48	$ 83
Stock options | 2007 Omnibus Incentive Plan
Vesting period				5 years
Stock option term (in years)				10 years
Stock options | Amended and Restated 2007 Omnibus Incentive Plan
Vesting period				4 years
Stock option term (in years)				10 years
RSUs
Total unrecognized compensation cost				$ 158
Weighted average period for cost to be recognized (in years)				2 years
Employee service share-based compensation, tax benefit from exercise of stock options				$ 32	$ 37	$ 35
RSUs | 2007 Omnibus Incentive Plan
Vesting period				5 years
RSUs | Amended and Restated 2007 Omnibus Incentive Plan
Vesting period				4 years
Common stock
Shares repurchased (in shares) | shares		3,906
Stock repurchased		$ 1
Series A Preferred Stock | Preferred stock
Preferred stock, dividend rate, percentage			4.75%
Preferred stock, convertible, conversion ratio			6.6632
Conversion of MCPS to common stock (in shares) | shares			11,000,000
Dividends (in usd per share) | $ / shares			$ 11.875
Series B Preferred Stock
Preferred stock, dividend rate, percentage					5.00%
Series B Preferred Stock | Preferred stock
Preferred stock, dividend rate, percentage	5.00%
Preferred stock, convertible, conversion ratio	5.0175
Conversion of MCPS to common stock (in shares) | shares	8,600,000
Dividends (in usd per share) | $ / shares	$ 12.50