Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies Recently Issued Accounting Guidance (Details)

v3.8.0.1
Summary of Significant Accounting Policies Recently Issued Accounting Guidance (Details) - USD ($)
3 Months Ended
Mar. 30, 2018
Mar. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Impact of New Pronouncements        
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest $ 1,327,000,000 $ 1,184,000,000    
Cash and cash equivalents 8,291,000,000 12,120,000,000 $ 6,006,000,000 $ 8,555,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents at end of period 8,748,000,000 12,682,000,000 6,373,000,000 8,850,000,000
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest 2,000,000 2,000,000    
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent 1,325,000,000 1,182,000,000    
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest 73,000,000 0    
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest 30,000,000 0    
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent 43,000,000 0    
Consolidated net income 1,400,000,000 1,184,000,000    
Net Income (Loss) Attributable to Noncontrolling Interest 32,000,000 2,000,000    
Net Income (Loss) Attributable to Parent 1,368,000,000 1,182,000,000    
Long Lived Assets Held-for-sale, Name [Domain]        
Impact of New Pronouncements        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents at end of period 7,000,000 311,000,000 13,000,000 49,000,000
Other Assets        
Impact of New Pronouncements        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents at end of period 281,000,000 251,000,000 257,000,000 246,000,000
Assets held for sale - discontinued operations [Member]        
Impact of New Pronouncements        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents at end of period 169,000,000 0 $ 97,000,000 $ 0
Accounting Standards Update 2014-09 [Member]        
Impact of New Pronouncements        
Cumulative Effect of New Accounting Principle in Period of Adoption 257,000,000      
Accounting Standards Update 2016-01 [Member]        
Impact of New Pronouncements        
Cumulative Effect of New Accounting Principle in Period of Adoption 409,000,000      
Accounting Standards Update 2016-15 [Member]        
Impact of New Pronouncements        
Proceeds from Insurance Settlement, Investing Activities   24,000,000    
Accounting Standards Update 2016-16 [Member]        
Impact of New Pronouncements        
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification $ 2,900,000,000      
Accounting Standards Update 2016-18 [Member]        
Impact of New Pronouncements        
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification   262,000,000    
Cash Outflows Related to Cash Included in Insurance Captives   180,000,000    
Cash Inflows Related to Cash Included in Insurance Captives   186,000,000    
Accounting Standards Update 2017-07 [Member]        
Impact of New Pronouncements        
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification   $ 18,000,000