Stockholders' Equity and Stock-based Compensation (Narrative) (Details) $ in Millions			6 Months Ended	12 Months Ended
	Apr. 17, 2023 shares	Apr. 15, 2022 shares	Jun. 30, 2023 USD ($) shares	Dec. 31, 2022	Jul. 16, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares to be repurchased (in shares)					20,000,000
Remaining number of shares authorized to be repurchased (in shares)			20,000,000
Common shares reserved for issuance under the 2007 Omnibus Incentive Plan (in shares)			41,000,000
RSU/PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost | $			$ 273
Weighted average period for cost to be recognized			2 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost | $			$ 309
Weighted average period for cost to be recognized			2 years
Preferred stock | Series B Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, dividend rate, percent	5.00%			5.00%
Preferred stock, convertible, conversion rate	5.0175
Common stock issued in connection with MCPS conversions (in shares)	8,600,000
Preferred stock | Preferred stock series A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, dividend rate, percent		4.75%
Preferred stock, convertible, conversion rate		6.6632
Common stock issued in connection with MCPS conversions (in shares)		11,000,000