Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Intangible Assets (Details)

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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Intangible Assets subject to amortization      
Gross carrying amount $ 1,588 $ 1,473  
Accumulated amortization (1,311) (1,162)  
Net carrying amount 277 311  
Amortization expense $ 139 137 $ 188
Customer relationships      
Intangible Assets subject to amortization      
Weighted Average Remaining Useful Life 2 years    
Gross carrying amount $ 1,036 1,007  
Accumulated amortization (910) (838)  
Net carrying amount $ 126 169  
Other      
Intangible Assets subject to amortization      
Weighted Average Remaining Useful Life 3 years    
Gross carrying amount $ 552 466  
Accumulated amortization (401) (324)  
Net carrying amount $ 151 $ 142