Consolidated Statements of Changes in Equity (Unaudited) - PAC - USD ($) $ in Millions	Total	Accumulated Other Comprehensive (Loss) Income, Net	PAC	PAC Preferred Stock	PAC Common Stock	PAC Additional Paid-in Capital	PAC Retained Earnings	PAC Accumulated Other Comprehensive (Loss) Income, Net
Balance at Dec. 31, 2019			$ 8,437	$ 2	$ 0	$ 4,479	$ 3,972	$ (16)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 4,628		628				628
Other comprehensive income (loss)	(177)	$ (177)	1					1
Balance at Sep. 30, 2020			9,066	2	0	4,479	4,600	(15)
Balance at Jun. 30, 2020			8,780	2	0	4,479	4,314	(15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,842		286				286
Other comprehensive income (loss)	242	242
Balance at Sep. 30, 2020			9,066	2	0	4,479	4,600	(15)
Balance at Dec. 31, 2020	43,010		9,173	2	0	4,479	4,711	(19)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,207		726				726
Other comprehensive income (loss)	33	29	1					1
Balance at Sep. 30, 2021	45,692		9,900	2	0	4,479	5,437	(18)
Balance at Jun. 30, 2021			9,567	2	0	4,479	5,105	(19)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,922		332				332
Other comprehensive income (loss)	(163)	$ (163)	1					1
Balance at Sep. 30, 2021	$ 45,692		$ 9,900	$ 2	$ 0	$ 4,479	$ 5,437	$ (18)