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Deferred Charges and Other Assets
 12 Months Ended
Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
DEFERRED CHARGES AND OTHER ASSETS
8.    DEFERRED CHARGES AND OTHER ASSETS

“Deferred charges and other assets, net” consisted of the following (in millions):
December 31,
20212020
Deferred turnaround and catalyst costs, net$1,853 $1,703 
Operating lease ROU assets, net (see Note 6)
1,284 1,204 
Investments in nonconsolidated joint ventures734 972 
Income taxes receivable586 589 
Goodwill260 260 
Intangible assets, net218 248 
Other941 565 
Deferred charges and other assets, net$5,876 $5,541 

Amortization expense for deferred turnaround and catalyst costs and intangible assets was $695 million, $748 million, and $759 million for the years ended December 31, 2021, 2020, and 2019, respectively.

The entire balance of goodwill is related to our Refining segment. See Note 18 for information on our reportable segments.