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TAXES ON INCOME (Tables)
 12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Components of Income Tax Expense The components of income tax expense (benefit) for 2020, 2019 and 2018 were as follows:
202020192018
Current:
Federal$300 $176 $82 
State and local74 53 26 
Foreign1 3 1 
Deferred:
Federal55 21 66 
State and local29 (4)10 
Foreign1 (2)(3)
Total$460 $247 $182 
Reconciliation of the Federal Statutory Rate A reconciliation of the federal statutory income tax rate to the Company's effective income tax rate for 2020, 2019 and 2018 was as follows:
202020192018
Tax provision at statutory rate21.0 %21.0 %21.0 %
State and local income taxes, net of federal benefit4.5 4.6 4.7 
Impact of noncontrolling interests(0.9)(1.1)(1.4)
Excess tax benefits on stock-based compensation arrangements(1.2)(1.2)(1.9)
Return to provision true-ups (0.7)(1.4)(1.4)
Change in accounting method— — (1.6)
Impact of equity earnings0.8 1.1 1.0 
Changes in reserves for uncertain tax positions0.9 1.7 (0.8)
Change in valuation allowances associated with certain net operating losses0.2 (1.1)— 
Other, net(0.1)(0.6)0.1 
Effective tax rate24.5 %23.0 %19.7 %
Schedule of Deferred Tax Assets and Liabilities The tax effects of temporary differences that give rise to significant portions of the deferred tax assets (liabilities) as of December 31, 2020 and 2019 were as follows:
20202019
Non-current deferred tax assets (liabilities):
Accounts receivable reserves$71 $64 
Liabilities not currently deductible146 126 
Stock-based compensation47 35 
Basis differences in investments, joint ventures and subsidiaries (81)(80)
Net operating loss carryforwards, net of valuation allowance61 75 
Operating lease right-of-use assets(151)(129)
Operating lease liabilities161 139 
Depreciation and amortization(604)(494)
Total non-current deferred tax liabilities, net$(350)$(264)
Schedule of Unrecognized Benefits The total amount of unrecognized tax benefits as of and for the years ended December 31, 2020, 2019 and 2018 consisted of the following:
202020192018
Balance, beginning of year$88 $107 $115 
Additions:
For tax positions of current year2 2 2 
For tax positions of prior years25 16 11 
Reductions:
Changes in judgment(9)(3)(6)
Expirations of statutes of limitations(4)(2)(15)
Settlements(9)(32)— 
Balance, end of year$93 $88 $107