Annual report pursuant to Section 13 and 15(d)

Summary of significant Accounting Policies - New Pronouncements (Details)

v3.3.1.900
Summary of significant Accounting Policies - New Pronouncements (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Deferred income tax liabilities $ 3,502 $ 2,821
Other assets, at cost, net of accumulated amortization 39 22
Long-term debt $ 7,481 7,062
Accounting Standards Update 2015-17 Deferred Income Taxes    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Deferred income tax liabilities, Current   972
Accounting Standards Update 2015-17 Deferred Income Taxes | New Accounting Principle Early Adoption    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Deferred income tax liabilities   972
Accounting Standards Update 2015-03 Debt Issuance Costs | New Accounting Principle Early Adoption    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Other assets, at cost, net of accumulated amortization   (43)
Long-term debt   $ (43)