ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - Schedule of Amounts Reclassified From AOCI By Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax Effect	$ (453,574)	$ (344,223)	$ (346,186)
Net Income Attributable to Common Shareholders	1,404,875	1,220,527	1,205,167
Defined Benefit Plan Costs:
Total Amounts Reclassified from AOCI, Net of Tax	(7,000)	(10,700)	(7,900)
Qualified Cash Flow Hedging Instruments, Net of Tax | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax Effect	0	700	900
Net Income Attributable to Common Shareholders	0	(1,000)	(1,600)
Amortization of Actuarial Losses
Defined Benefit Plan Costs:
Reclassifications from AOCI	(9,000)	(13,100)	(8,100)
Amortization of Prior Service Cost
Defined Benefit Plan Costs:
Reclassifications from AOCI	(300)	0	(300)
Defined Benefit Plans
Defined Benefit Plan Costs:
Reclassifications from AOCI	(9,300)	(13,100)	(8,400)
Tax Effect	2,300	3,400	2,100
Total Amounts Reclassified from AOCI, Net of Tax	(7,000)	(9,700)	(6,300)
Interest Expense | Qualified Cash Flow Hedging Instruments, Net of Tax | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Qualified Cash Flow Hedging Instruments	$ 0	$ (1,700)	$ (2,500)