CONSOLIDATED STATEMENTS OF SHAREHOLDER’S INTEREST - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Shareholder's Interest [Roll Forward]
Balance at beginning of period	$ 14,544	$ 14,130	$ 13,757	$ 13,554	$ 13,503	$ 13,389	$ 13,757	$ 13,389
Net income / (loss)	566	543	424	493	255	234	1,533	982
Other comprehensive income/(loss), net of tax	(43)	371	149	158	(54)	(120)
Distributions declared	(350)	(500)	(200)	(175)	(150)
Balance at end of period	14,717	14,544	14,130	14,030	13,554	13,503	14,717	14,030
Shareholder’s Interest
Shareholder's Interest [Roll Forward]
Balance at beginning of period	5,166	5,166	5,166	5,166	5,166	5,166	5,166	5,166
Balance at end of period	5,166	5,166	5,166	5,166	5,166	5,166	5,166	5,166
Accumulated Other Comprehensive Income/(Loss)
Shareholder's Interest [Roll Forward]
Balance at beginning of period	(697)	(1,068)	(1,217)	(1,003)	(949)	(829)	(1,217)	(829)
Other comprehensive income/(loss), net of tax	(43)	371	149	158	(54)	(120)
Balance at end of period	(740)	(697)	(1,068)	(845)	(1,003)	(949)	(740)	(845)
Retained Earnings
Shareholder's Interest [Roll Forward]
Balance at beginning of period	10,075	10,032	9,808	9,391	9,286	9,052	9,808	9,052
Net income / (loss)	566	543	424	493	255	234
Distributions declared	(350)	(500)	(200)	(175)	(150)
Balance at end of period	$ 10,291	$ 10,075	$ 10,032	$ 9,709	$ 9,391	$ 9,286	$ 10,291	$ 9,709