SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - Footnote 3 Schedule of Long-Term Debt (Details) $ in Millions	1 Months Ended
	Aug. 31, 2025 USD ($) business_day	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Condensed Financial Information Of Parent [Line Items]
Gross long-term debt		$ 11,958	$ 16,590
Long-term debt		$ 28,979	31,558
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate	6.375%
Debt amount	$ 800
Number of days before interest rate period | business_day	2
Variable percentage rate	2.632%
Proceeds from issuance of debt	$ 791
Underwriting discounts and debt issuance costs	$ 9
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term One
Condensed Financial Information Of Parent [Line Items]
Debt instrument, redemption price, percentage	100.00%
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term Two
Condensed Financial Information Of Parent [Line Items]
Debt instrument, redemption price, percentage	100.00%
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term Three
Condensed Financial Information Of Parent [Line Items]
Debt instrument, redemption price, percentage	102.00%
Other Long-Term Debt, 4.125% Junior Subordinated Notes Due 2052 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		4.125%
6.40% Junior Subordinated Notes, Due October 1, 2054 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.40%
6.875% Junior Subordinated Notes, Due October 1, 2054 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.875%
6.550% Junior Subordinated Notes Due 2055 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.55%
6.625% Junior Subordinated Notes Due 2055 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.625%
Other Long-Term Debt, 5.75% Junior Subordinated Notes Due 2079 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		5.75%
Parent Company
Condensed Financial Information Of Parent [Line Items]
Gross long-term debt		$ 11,958	11,908
Current portion of long-term debt		(549)	(750)
Unamortized discount on long-term debt		(26)	(30)
Unamortized debt issuance costs		(104)	(100)
Long-term debt		$ 11,279	11,028
Parent Company | 3.30% Notes April 1, 2025
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		3.30%
Gross long-term debt		$ 0	750
Parent Company | 5.40% Notes August 1, 2026
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		5.40%
Gross long-term debt		$ 550	550
Parent Company | 3.25% Notes June 15, 2027
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		3.25%
Gross long-term debt		$ 750	750
Parent Company | 3.40% Notes February 1, 2028
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		3.40%
Gross long-term debt		$ 1,000	1,000
Parent Company | 3.70% Notes April 1, 2029
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		3.70%
Gross long-term debt		$ 500	500
Parent Company | 5.50% Notes August 1, 2033
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		5.50%
Gross long-term debt		$ 700	700
Parent Company | 3.80% Notes February 1, 2038
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		3.80%
Gross long-term debt		$ 1,000	1,000
Parent Company | 6.00% Notes October 15, 2039
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.00%
Gross long-term debt		$ 750	750
Parent Company | 4.00% Notes February 1, 2048
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		4.00%
Gross long-term debt		$ 800	800
Parent Company | 4.125% Junior Subordinated Notes April 1, 2052
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		4.125%
Gross long-term debt		$ 1,000	1,000
Parent Company | Junior Subordinated Notes 6.40% Due 2054
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.40%
Gross long-term debt		$ 1,250	1,250
Parent Company | Junior Subordinated Notes 6.875% Due 2054
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.875%
Gross long-term debt		$ 600	600
Parent Company | Junior Subordinated Notes 6.875% Due 2054, Number 2
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.875%
Gross long-term debt		$ 500	500
Parent Company | Junior Subordinated Notes 6.55% Due 2055
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.55%
Gross long-term debt		$ 600	600
Parent Company | Junior Subordinated Notes 6.625% Due 2055
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.625%
Gross long-term debt		$ 400	400
Parent Company | 5.75% Junior Subordinated Notes July 1, 2079
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		5.75%
Parent Company | 6.375% (next rate reset on April 1, 2031) Junior Subordinate Notes April 1, 2056
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.375%
Gross long-term debt		$ 800	0
Parent Company | 5.75% Junior Subordinated Notes July 1, 2079
Condensed Financial Information Of Parent [Line Items]
Gross long-term debt		$ 758	$ 758
Parent Company | 6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate	6.375%
Debt amount	$ 800
Number of days before interest rate period | business_day	2
Variable percentage rate	2.632%
Proceeds from issuance of debt	$ 791
Underwriting discounts and debt issuance costs	$ 9
Parent Company | 6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term One
Condensed Financial Information Of Parent [Line Items]
Debt instrument, redemption price, percentage	100.00%
Parent Company | 6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term Two
Condensed Financial Information Of Parent [Line Items]
Debt instrument, redemption price, percentage	100.00%
Parent Company | 6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term Three
Condensed Financial Information Of Parent [Line Items]
Debt instrument, redemption price, percentage	102.00%
Parent Company | Other Long-Term Debt, 4.125% Junior Subordinated Notes Due 2052 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		4.125%
Parent Company | 6.40% Junior Subordinated Notes, Due October 1, 2054 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.40%
Parent Company | 6.875% Junior Subordinated Notes, Due October 1, 2054 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.875%
Parent Company | 6.550% Junior Subordinated Notes Due 2055 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.55%
Parent Company | 6.625% Junior Subordinated Notes Due 2055 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		6.625%
Parent Company | Other Long-Term Debt, 5.75% Junior Subordinated Notes Due 2079 | Junior Subordinated Debt
Condensed Financial Information Of Parent [Line Items]
Stated percentage rate		5.75%