ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - Schedule of Amounts Reclassified From AOCI By Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax Effect	$ (344,223)	$ (346,186)	$ (273,499)
Net Income Attributable to Common Shareholders	1,220,527	1,205,167	909,053
Defined Benefit Plan Costs:
Total Amounts Reclassified from AOCI, Net of Tax	(10,700)	(7,900)	(7,000)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax Effect	700	900	1,100
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]
Net Income Attributable to Common Shareholders	(1,000)	(1,600)	(1,400)
Amortization of Actuarial Losses
Defined Benefit Plan Costs:
Reclassifications from AOCI	(13,100)	(8,100)	(5,700)
Amortization of Prior Service Credit/(Cost)
Defined Benefit Plan Costs:
Reclassifications from AOCI	0	(300)	(1,800)
Defined Benefit Plans
Defined Benefit Plan Costs:
Reclassifications from AOCI	(13,100)	(8,400)	(7,500)
Tax Effect	3,400	2,100	1,900
Total Amounts Reclassified from AOCI, Net of Tax	(9,700)	(6,300)	(5,600)
Interest Expense | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Qualified Cash Flow Hedging Instruments	$ (1,700)	$ (2,500)	$ (2,500)