Quarterly report pursuant to Section 13 or 15(d)

Summary of Intangible Assets (Detail)

v3.10.0.1
Summary of Intangible Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 4,763 $ 4,578
Accumulated Amortization (2,735) (2,614)
Net Carrying Value 2,028 1,964
Licenses    
Finite-Lived Intangible Assets [Line Items]    
Carrying value 5  
Trade name    
Finite-Lived Intangible Assets [Line Items]    
Carrying value 200  
Capitalized software    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,507 3,273
Accumulated Amortization (2,404) (2,310)
Net Carrying Value 1,103 963
Licenses    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 115 114
Accumulated Amortization (23) (10)
Net Carrying Value 92 104
Franchise rights    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 145 144
Accumulated Amortization (101) (97)
Net Carrying Value 44 47
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 741 776
Accumulated Amortization (182) (160)
Net Carrying Value 559 616
Trade name    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 200 200
Accumulated Amortization 0 0
Net Carrying Value 200 200
Trademarks, patents and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 55 71
Accumulated Amortization (25) (37)
Net Carrying Value $ 30 $ 34