v3.7.0.1
Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]  
Carrying Amounts of Identifiable Intangible Assets

The carrying amounts of identifiable intangible assets are summarized as follows:

 

(in millions)

 

Indefinite-lived

 

 

Finite-lived

 

 

Total

 

December 31, 2016

 

$

17,178

 

 

$

185

 

 

$

17,363

 

Amortization expense

 

 

—

 

 

 

(50

)

 

 

(50

)

Acquisition (1)

 

 

—

 

 

 

110

 

 

 

110

 

June 30, 2017

 

$

17,178

 

 

$

245

 

 

$

17,423

 

 

(1) In connection with the First Reserve Transaction, the Company acquired $110 million of finite-lived assets with a weighted-average estimated life of approximately nine years.