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Leases
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Leases Leases
Total lease expense was $57 million and $55 million for the years ended December 31, 2020 and 2019, which includes operating lease expense of $38 million and $37 million and variable lease expense of $19 million and $18 million for the years ended December 31, 2020 and 2019, respectively. Prior to the adoption of the new leasing standard, lease expense for the year ended December 31, 2018 was $62 million. Cash paid for amounts included in operating lease liabilities was $41 million and $34 million for the years ended December 31, 2020 and 2019. Operating lease ROU assets obtained in exchange for lease obligations were $6 million and $12 million for the years ended December 31, 2020 and 2019.
The following table presents operating lease ROU assets and lease liabilities.
(In millions)December 31, 2020December 31, 2019
Operating lease ROU assets$199 $220 
Operating lease liabilities279 301 
The following table presents the maturities of operating lease liabilities
(In millions)December 31, 2020
2021$44 
202241 
202336 
202429 
202524 
Thereafter163 
Total lease payments337 
Less: Discount(58)
Total operating lease liabilities$279 
The following table presents the weighted average remaining lease term for operating leases and weighted average discount rate used in calculating operating lease ROU assets.
December 31, 2020December 31, 2019
Weighted average remaining lease term10.3 years10.8 years
Weighted average discount rate3.4 %3.4 %