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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]    
Alternative minimum tax and other credit carryforwards $ 772.7 $ 1,074.0
Accrued and unfunded compensation and employee benefits 321.8 265.6
Amortizable intangible assets 69.3 92.7
Compensation expense related to stock options 11.1 5.8
Accrued liabilities 126.6 112.1
Accrued pension liability 3.1 1.5
Investments 2.6 3.1
Net operating loss carryforwards 129.4 32.7
Capital loss carryforwards 8.1 8.9
Lease liabilities 96.5 106.4
Capitalized indirect property costs 394.1  
Hedging instruments   27.3
Other 4.3 5.0
Total deferred tax assets 1,939.6 1,735.1
Valuation allowance for deferred tax assets (135.2) (154.9)
Deferred tax assets 1,804.4 1,580.2
Nondeductible amortizable intangible assets 433.9 394.7
Investment-related partnerships 6.6 4.6
Depreciable fixed assets 46.5 16.2
Right-of-use assets 88.6 96.9
Hedging instruments 10.7  
Other prepaid items 11.8 8.8
Total deferred tax liabilities 598.1 521.2
Net deferred tax assets $ 1,206.3 $ 1,059.0