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Accumulated Other Comprehensive (Loss) Income - Impact and Location of AOCI Reclassifications in Consolidated Statements of Income (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]                      
Cost of services                 $ (814) $ (810) $ (786)
Selling, general and administrative expenses                 (765) (770) (757)
Research and development expenses                 (228) (206) (184)
Other income                 (51) 9 24
Income Tax Expense (Benefit)                 (70) (127) (131)
Net (loss) income $ (49) $ 78 $ (265) $ 22 $ 118 $ 94 $ 96 $ 59 (214) 367 377
Amount Reclassified from of Accumulated Other Comprehensive Income                      
Defined Benefit Plan Disclosure [Line Items]                      
Cost of services                 (2) (1) (2)
Selling, general and administrative expenses                 (1) 0 (1)
Research and development expenses                 0 0 1
Other income                 (42) 0 0
Income Tax Expense (Benefit)                 (16) 0 0
Net (loss) income                 $ 23 $ (1) $ (2)