CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statements of Comprehensive Income/(loss)
Net income	$ 539,038	$ 113,943	$ 612,175	$ 331,090
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	(5,118)	16,889	82,130	113,696
Net unrealized gains (losses) on cash flow hedges	(2,933)	2,844	10,145	17,140
Net unrealized gains (losses) on pension and other postretirement plans	2,379	2,102	6,863	5,126
Other comprehensive income (loss)	(5,672)	21,835	99,138	135,962
Comprehensive income (loss)	533,366	135,778	711,313	467,052
Comprehensive income attributable to noncontrolling interest	2,977	2,883	8,680	8,555
Comprehensive income attributable to controlling interest	530,389	132,895	702,633	458,497
Income tax expense (benefit) of items included in Other comprehensive income:
Net unrealized gains (losses) on securities available for sale	(2,253)	5,544	26,198	37,321
Net unrealized gains (losses) on cash flow hedges	(771)	934	3,494	5,626
Net unrealized gains (losses) on pension and other postretirement plans	$ 2,208	$ 690	$ 3,670	$ 1,683