Stockholders' Equity and Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions				1 Months Ended	12 Months Ended
	Apr. 17, 2023 $ / shares shares	Jul. 22, 2022 USD ($) shares	Apr. 15, 2022 $ / shares shares	Jan. 31, 2025 USD ($) shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares	Jul. 22, 2024 shares	Jul. 16, 2013 shares
Aggregate intrinsic value of options exercised					$ 413	$ 259	$ 288
Cash receipts due to exercise of options					259	148	130
Employee service share-based compensation, tax benefit from exercise of stock options					107	80	85
Tax benefit					$ 70	$ 51	$ 61
Aggregate number of shares withheld to satisfy tax requirement | shares					396,000	369,000
Aggregate value of shares withheld to satisfy tax requirement					$ 97	$ 80
Completed Repurchase Program
Repurchase of common stock authorized (in shares) | shares									20,000,000
Excise tax on stock repurchases					$ 52
Stock repurchase program, remaining number of shares authorized to be repurchased, shares | shares					0
New Repurchase Program
Repurchase of common stock authorized (in shares) | shares								20,000,000
Shares repurchased (in shares) | shares					3,500,000
Repurchases of common stock					$ 817
Excise tax on stock repurchases					$ 8
Stock repurchase program, remaining number of shares authorized to be repurchased, shares | shares					16,500,000
New Repurchase Program | Subsequent event
Shares repurchased (in shares) | shares				4,500,000
Repurchases of common stock				$ 1,100
Excise tax on stock repurchases				$ 11
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					47,000,000
Stock options
Total unrecognized compensation cost					$ 174
Weighted average period for cost to be recognized (in years)					2 years
Weighted average grant date fair value (in usd per share) | $ / shares					$ 83.12	$ 68.92	$ 71.35
Employee service share-based compensation, tax benefit from exercise of stock options					$ 79	$ 48	$ 48
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					$ 144
Weighted average period for cost to be recognized (in years)					2 years
Employee service share-based compensation, tax benefit from exercise of stock options					$ 28	$ 32	$ 37
RSUs | 2007 Omnibus Incentive Plan
Vesting period					5 years
RSUs | Amended and Restated 2007 Omnibus Incentive Plan
Vesting period					4 years
Common stock | Completed Repurchase Program | Related Party
Repurchases of common stock					$ 173
Common stock | Completed Repurchase Program
Shares repurchased (in shares) | shares		4,000			20,000,000.0
Repurchases of common stock		$ 1			$ 5,200
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
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