Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 639	$ (1,400)
Other comprehensive income (loss) net of income taxes:
Change in unrealized gains (losses), net of reclassification adjustment	(3,826)	(3,153)
Changes in defined benefit plan related items not yet recognized in periodic benefit cost, net of reclassification adjustment	43	33
Foreign currency translation adjustment	(12)	(6)
Total other comprehensive income (loss), net of income taxes	(3,795)	(3,126)
Comprehensive income (loss)	(3,156)	(4,526)
Less: Comprehensive income (loss) attributable to the noncontrolling interest	62	85
Comprehensive income (loss) attributable to Holdings	$ (3,218)	$ (4,611)