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Description of Business, Basis of Presentation, and Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2016
Accounting Policies [Abstract]  
Balance sheet line items retrospectively adjusted for the adoption of new accounting pronouncements
The following table presents our previously reported balance sheet line items retrospectively adjusted for the adoption of these pronouncements (in millions):
 
December 31, 2015
 
Previously
Reported
 
Reclassifications
 
Currently Reported
Assets
 
 
 
 
 
Current deferred income taxes
$
74

 
$
(74
)
 
$
—

Deferred charges and other assets, net
2,668

 
(42
)
 
2,626

Liabilities
 
 
 
 
 
Current deferred income taxes
366

 
(366
)
 
—

Debt and capital lease obligations,
less current portion
7,250

 
(42
)
 
7,208

Deferred income taxes
6,768

 
292

 
7,060